Sightsound Technologies, LLC v. Apple Inc. , 809 F.3d 1307 ( 2015 )


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  •   United States Court of Appeals
    for the Federal Circuit
    ______________________
    SIGHTSOUND TECHNOLOGIES, LLC,
    Appellant
    v.
    APPLE INC.,
    Appellee
    ______________________
    2015-1159, 2015-1160
    ______________________
    Appeals from the United States Patent and Trade-
    mark Office, Patent Trial and Appeal Board in No.
    CBM2013-00020.
    ______________________
    Decided: December 15, 2015
    ______________________
    MATTHEW WOLF, Arnold & Porter LLP, Washington,
    DC, argued for appellant. Also represented by JENNIFER
    SKLENAR, Los Angeles, CA.
    DOUGLAS HALLWARD-DRIEMEIER, Ropes & Gray LLP,
    Washington, DC, argued for appellee. Also represented
    by JON STEVEN BAUGHMAN, SHARON LEE, MEGAN
    FREELAND RAYMOND, PAUL MICHAEL SCHOENHARD,
    DARRELL STARK; CHING-LEE FUKUDA, New York, NY;
    2               SIGHTSOUND TECHNOLOGIES, LLC   v. APPLE INC.
    JAMES RICHARD BATCHELDER, LAUREN NICOLE ROBINSON,
    East Palo Alto, CA.
    BENJAMIN T. HICKMAN, United States Patent and
    Trademark Office, Office of the Solicitor, Alexandria, VA,
    argued for intervenor Michelle K. Lee. Also represented
    by NATHAN K. KELLEY, SCOTT C. WEIDENFELLER.
    ______________________
    Before LOURIE, DYK, and HUGHES, Circuit Judges.
    DYK, Circuit Judge.
    SightSound Technologies, LLC (“SightSound”) is the
    owner of U.S. Patent No. 5,191,573 (the “’573 patent”) and
    5,966,440 (the “’440 patent”). Apple Inc. (“Apple”) peti-
    tioned the United States Patent and Trademark Office
    (“PTO”) for covered business method (“CBM”) review of
    claims 1, 2, 4, and 5 of the ’573 patent and claims 1, 64,
    and 95 of the ’440 patent. The PTO granted Apple’s
    petition and instituted CBM review. The Patent Trial
    and Appeal Board (“the Board”) issued a final decision
    finding all the challenged claims would have been obvi-
    ous. SightSound appealed.
    We hold that we lack jurisdiction to review the PTO’s
    decision to consider issues not explicitly raised in the
    petitions. We do, however, have jurisdiction to review
    whether the patents qualify as CBM patents. We affirm
    the Board’s determination that the ’573 and ’440 patents
    qualify as CBM patents. Finally, we affirm the Board’s
    final decision with respect to claim construction and
    obviousness.
    BACKGROUND
    The ’573 and ’440 patents owned by SightSound
    disclose methods for the electronic sale and distribution of
    digital audio and video signals. Each of the relevant
    SIGHTSOUND TECHNOLOGIES, LLC     v. APPLE INC.                3
    claims requires (1) forming a connection, through tele-
    communications lines, between a first party’s first
    memory and a second party’s second memory; (2) selling
    the desired digital video or digital audio signals to the
    second party for a fee through telecommunications lines;
    (3) transmitting the desired signal from the first memory
    to the second memory via telecommunications lines; and
    (4) storing the transmitted signal in the second memory.
    E.g., ’440 patent col. 8 ll. 44–64; ’573 patent col. 6 ll. 4–24.
    Dependent claim 2 of the ’573 patent adds the step of
    searching for and selecting a signal from the first memory
    after the signal has been transferred. ’573 patent col. 6
    ll. 25–29. Claims 4 and 5 of the ’573 patent are the same
    as claims 1 and 2 respectively, but substitute digital video
    for audio signals. 
    Id. col. 6
    ll. 36–59. Claims 64 and 95 of
    the ’440 patent recite additional limitations, including
    storing digital signals “in the second party hard disk.”
    U.S. Patent No. 5,966,440 C1 (re-examination certificate)
    (“’440 C1 patent”) col. 8 ll. 14–44, col. 13 ll. 14–51.
    On May 6, 2013, Apple filed petitions with the Board
    seeking CBM review of the ’573 and ’440 patents under
    AIA § 18. See Leahy-Smith America Invents Act (“AIA”),
    Pub. L. 112-29, 125 Stat. 284, 329–31 (2011). 1 Apple
    argued that claims 1, 2, 4, and 5 of the ’573 patent and
    claims 1, 64, and 95 of the ’440 patent were invalid as
    anticipated under 35 U.S.C. § 102. The Board instituted
    CBM review. In instituting review, the Board applied the
    definition of CBM in the statute and regulations. See AIA
    § 18(d); 37 C.F.R. § 42.301. The Board first determined
    1   In general, the AIA is codified in various parts of
    Title 35 of the U.S. Code. Section 18 of the AIA, however,
    is not codified; it is found in pages 329–31 of 125 Stat.
    References to § 18 in this opinion are to the statutes at
    large.
    4               SIGHTSOUND TECHNOLOGIES, LLC    v. APPLE INC.
    that the ’573 and ’440 patents are CBM patents because
    they recite the electronic movement of money between
    financially distinct entities, an activity that is “financial
    in nature,” and do not include novel and non-obvious
    technological features that would otherwise excluded
    them from CBM treatment. J.A. 556–59, 987–94. The
    Board then determined that there was a reasonable
    likelihood that the asserted claims were anticipated or
    rendered obvious by a series of disclosures relating to a
    computer system developed by CompuSonics in the 1980s.
    Although Apple’s petitions included the grounds on which
    the PTO instituted review with respect to anticipation
    and alleged facts to support obviousness, the petitions did
    not specifically allege obviousness over CompuSonics.
    The Board nonetheless held that it was appropriate to
    initiate review on obviousness grounds: “[I]n addition to
    Petitioner’s asserted ground of anticipation . . . we exer-
    cise our discretion to institute a covered business method
    review . . . on the ground of unpatentability over the
    CompuSonics publications under 35 U.S.C. § 103(a).” J.A.
    571.
    During the CBM proceedings SightSound argued that
    it had been deprived of a fair opportunity to respond to
    the obviousness grounds on which the CBM review had
    been instituted. The Board granted SightSound addition-
    al time for argument and authorized it to file sur-replies
    and new declaration testimony on the issue of obvious-
    ness, “to ensure that Patent Owner has a full and fair
    opportunity to be heard on the issue of obviousness.” J.A.
    709, 1003.
    In its final decision on the merits, the Board rejected
    SightSound’s contention that the term “second memory” is
    limited to non-removable media, relying on the claim
    language, specification, and prosecution history to con-
    clude that under the broadest reasonable interpretation
    standard the term encompasses any second storage space
    SIGHTSOUND TECHNOLOGIES, LLC     v. APPLE INC.           5
    in a computer medium that is capable of retaining data or
    instructions and is not limited to hard disks. The Board
    reaffirmed the initiation decision that the Board did not
    exceed its jurisdiction when it initiated CBM review,
    explaining that, while Apple’s petitions did not assert
    obviousness explicitly, they nevertheless “supported
    [such] a ground” based on their detailed explanation of
    the various CompuSonics references. J.A. 25–27, 92–94.
    The Board held claims 1, 2, 4, and 5 of the ’573 patent and
    claim 1 of the ’440 patent invalid as obvious. It found
    that “Apple explains in detail in its Petition[s] how the
    CompuSonics publications teach every limitation” of the
    claims, J.A. 31, 98, and that the reason to combine was
    manifested by the references themselves. The Board also
    held claims 64 and 95 of the ’440 patent invalid as obvi-
    ous, finding that the CompuSonics publications would
    have suggested to an ordinary artisan the desirability of
    using a hard disk in connection with the other claimed
    aspects of the invention. SightSound appealed. The PTO
    intervened. We have jurisdiction to review the Board’s
    final decision under 28 U.S.C. § 1295(a)(4)(A) and 35
    U.S.C. § 329.
    DISCUSSION
    I
    We first address the question of jurisdiction. CBM
    patents are governed by the special provisions of AIA
    § 18. For purposes of conducting proceedings and appel-
    late review, section 18 is considered part of the broader
    chapter 32 provisions of title 35 of the U.S. Code, govern-
    ing post-grant review (“PGR”). 2 Decisions relating to the
    2   “The transitional proceeding implemented pursu-
    ant to this subsection shall be regarded as, and shall
    employ the standards and procedures of, a post-grant
    6               SIGHTSOUND TECHNOLOGIES, LLC   v. APPLE INC.
    institution of CBM review are not reviewable. “The
    determination by the Director whether to institute a post-
    grant review under this section shall be final and nonap-
    pealable.” 35 U.S.C. § 324(e). As noted, this provision is
    applicable to both PGR and CBM proceedings; the Board
    acts for the Director in deciding whether to institute a
    review. See AIA § 18(a)(1); 37 C.F.R. § 42.4. After CBM
    review is instituted, CBM review proceeds before the
    Board, and concludes with the Board’s “final written
    decision” pursuant to 35 U.S.C. § 328(a). Section 329
    provides for appeal of that decision to this court. Thus the
    decision whether to initiate is not appealable, but the
    final decision is subject to review. See In re Cuozzo Speed
    Techs., LLC, 
    793 F.3d 1268
    , 1273 (Fed. Cir. 2015).
    A
    SightSound contends that we should set aside the
    final decision because the proceedings were improperly
    initiated since Apple did not explicitly raise the issue of
    obviousness in its petitions. 3 The Board rejected this
    argument, explaining that Apple’s petitions supported
    review for obviousness because they explained in detail
    how the CompuSonics disclosures “teach every limitation
    of the claims . . . and describe similar features and relate
    review under chapter 32 of title 35.” AIA § 18(a)(1). See
    also Versata Dev. Grp., Inc. v. SAP Am., Inc., 
    793 F.3d 1306
    , 1315 (Fed. Cir. 2015) (“Versata II”).
    3   SightSound relies on 35 U.S.C. § 322(a)(3), which
    requires that a petition must recite “in writing and with
    particularity, each claim challenged, the grounds on
    which the challenge to each claim is based, and the evi-
    dence that supports the grounds for the challenge to each
    claim,” and 37 C.F.R. § 42.204(b), which requires a peti-
    tion to include the “specific statutory grounds . . . on
    which the challenge to [each] claim is based.”
    SIGHTSOUND TECHNOLOGIES, LLC    v. APPLE INC.              7
    to each other.” J.A. 26. Because the CompuSonics refer-
    ences described various advantages of a system that
    would enable electronic music processing, “the references
    themselves demonstrate that a person of ordinary skill in
    the art would have been led to create a system for users to
    purchase and download music.” 
    Id. at 40.
    The PTO and
    Apple argue that the statute and our prior decision in In
    re Cuozzo Speed 
    Technologies., 793 F.3d at 1268
    , bars this
    Court from reviewing whether the Board properly initiat-
    ed review when obviousness was not explicitly raised in
    the petitions. We agree.
    In Cuozzo we considered § 314(d), applicable to inter
    partes review proceedings, which mirrors the bar on
    appeal in § 324(e). It provides that “[t]he determination
    by the Director whether to institute an inter partes re-
    view under this section shall be final and nonappealable.”
    35 U.S.C. § 314(d). There, Cuozzo argued that the PTO
    improperly instituted inter partes review with respect to
    certain claims because it relied on prior art references not
    identified by the petitioner in its petitions contrary to the
    requirements of 35 U.S.C. § 312(a)(3). 
    Cuozzo, 793 F.3d at 1272
    . We rejected Cuozzo’s challenge as barred by the
    statute. 
    Id. at 1274.
    We held that § 314(d) “bar[s] review
    of all institution decisions, even after the Board issues a
    final decision.” 
    Id. at 1273.
    We explained that generally
    institution decisions are not reviewable, and in particular
    a challenge based on a defect in the initiation that could
    have been cured by a proper pleading is not reviewable.
    
    Id. at 1274.
    Only limitations on the Board’s authority to
    issue a final decision are subject to review.
    In Achates Reference Publishing. Inc. v. Apple Inc.,
    
    803 F.3d 652
    (Fed. Cir. 2015), we again considered alleged
    defects in the initiation of inter partes review. There,
    Achates argued that the Board improperly instituted
    inter partes review because the underlying petitions were
    time-barred under 35 U.S.C. § 315(b). Once again, we
    8              SIGHTSOUND TECHNOLOGIES, LLC   v. APPLE INC.
    rejected the argument as barred by the statute. 
    Achates, 803 F.3d at 658
    . We explained that just as the pleading
    in Cuozzo could have been made “sufficient by the inclu-
    sion of the missing prior art reference . . . the [alleged]
    timeliness issue here could have been avoided if Apple’s
    petition had been filed a year earlier or if a petition
    identical to Apple’s were filed by another party.” 
    Id. at 657.
    Achates’ argument thus challenged nothing more
    than the Board’s determination to institute inter partes
    review.
    The same is true here. SightSound argues that the
    Board erred in considering obviousness because Apple
    failed to include such argument in its petitions. As in
    Cuozzo, the statute does not limit the Board’s authority at
    the final decision stage to grounds alleged in the CBM
    petitions. The reasoning of Cuozzo and Achates applies
    not only to § 314(d), involved in Cuozzo and Achates, but
    also to § 324(e), the identical provision applicable to CBM
    review. SightSound argues that the “under this section”
    language in § 324(e) only bars review of challenges to
    institution decisions based on the grounds specified in
    § 324(a) and (b). We reject this argument. Section 324(e)
    bars review of any institution decision. Cuozzo and
    Achates control, and the challenge is therefore barred by
    § 324. 4 We also see no basis for mandamus relief on the
    Board’s initiation decision, because “the situation here is
    far from satisfying the clear-and-indisputable require-
    ment for mandamus.” 
    Cuozzo, 793 F.3d at 1275
    .
    4   We see no merit in SightSound’s contention that
    the Board’s approach deprived it of due process, particu-
    larly in light of the Board’s care in giving SightSound
    multiple opportunities to comment on the obviousness
    issue beyond what was required.
    SIGHTSOUND TECHNOLOGIES, LLC     v. APPLE INC.           9
    B
    SightSound also contends that the ’573 and ’440
    patents are not CBM patents, and therefore the Board
    lacked authorization to review them. The PTO and Apple
    again argue that we are barred from reviewing this
    question. Here we disagree.
    We previously addressed our jurisdiction to review the
    Board’s determination of whether patents are CBM
    patents in Versata II. There we held that the question of
    whether a patent falls within the scope of the Board’s
    authority under AIA § 18 as a CBM patent is a limitation
    on the Board’s authority to issue a final decision and may
    be reviewed on appeal from a final written decision of the
    Board. 
    Id. at 1319.
    While Versata II is limited to our
    review of Board determinations of whether a patent falls
    within its § 18 authority as a CBM patent, that is precise-
    ly the issue here. Accordingly, Versata II controls, and
    SightSound’s contention that the Board lacked jurisdic-
    tion to review the ’573 and ’440 patents because they are
    not CBM patents is not barred by § 324(e).
    II
    CBM review is available only for patents that fall un-
    der the definition of a “covered business method patent.”
    The statute defines that term:
    For the purposes of this section, the term “covered
    business method patent” means a patent that
    claims a method or corresponding apparatus for
    performing data processing or other operations
    used in the practice, administration, or manage-
    ment of a financial product or service, except that
    the term does not include patents for technological
    inventions.
    AIA § 18(d). There are three sources of PTO rulemaking
    relevant to CBM review. First, 35 U.S.C. § 326, which is
    10                SIGHTSOUND TECHNOLOGIES, LLC   v. APPLE INC.
    applicable to CBM review through the PGR provisions,
    grants the PTO authority to “prescribe regulations . . .
    setting forth the standards for the showing of sufficient
    grounds to institute a review.” 35 U.S.C. § 326(a)(2).
    Second, AIA § 18 grants the PTO general authority to
    “issue regulations establishing and implementing a
    transitional post-grant review proceeding for the review of
    the validity of covered business method patents.” AIA
    § 18(a)(1). Third, AIA § 18 grants the PTO specific au-
    thority with respect to the “technological inventions”
    element of the covered business method patent definition:
    To assist in implementing the transitional pro-
    ceeding authorized by this subsection, the Direc-
    tor shall issue regulations for determining
    whether a patent is for a technological invention.
    AIA § 18(d)(2).
    A
    We need not decide whether Chevron deference ap-
    plies because the only legal questions regarding applica-
    tion of AIA § 18 to the patents-at-issue were decided by
    Versata II. SightSound primarily contends that its pa-
    tents are not CBM patents because to “relate to a finan-
    cial product or service the invention as a whole must be
    directed to the management of money, banking, or in-
    vestment or credit.” Appellant’s Br. 30. Versata II fore-
    closed this interpretation: “as a matter of statutory
    construction, the definition of ‘covered business method
    patent’ is not limited to products and services of only the
    financial industry, or to patents owned by or directly
    affecting activities of financial 
    institutions.” 793 F.3d at 1325
    . We explained that the interpretation proposed by
    SightSound would “require reading limitations into the
    statute that are not there.” 
    Id. Here, the
    Board conclud-
    ed that a “financial activity” not directed to money man-
    agement or banking can constitute a “financial product or
    SIGHTSOUND TECHNOLOGIES, LLC     v. APPLE INC.           11
    service” within the meaning of the statute. J.A. 988;
    accord J.A. 556. Versata II directly supports this conclu-
    sion.
    SightSound also contends that its patents are not
    CBM patents because they claim technological inventions,
    since they “recite a computer to transmit, and a second
    memory to store, digital signals in a way that prior art
    hardware units did not.” Appellant’s Br. 35 n.9. Versata
    II again foreclosed this interpretation: “the presence of a
    general purpose computer to facilitate operations through
    uninventive steps” in a patent does not render it a techno-
    logical invention within the meaning of the statute. 
    Id. at 1327.
    Claiming a computer without “specific, unconven-
    tional software, computer equipment, tools or processing
    capabilities” is insufficient. 
    Id. Here, the
    Board conclud-
    ed that a combination of known technologies does not
    amount to a “technological invention” within the meaning
    of the statute. J.A. 559–60, 993–94. Versata II also
    directly supports this conclusion.
    B
    We next address the Board’s determinations that the
    particular patents at issue are CBM patents. In this
    respect, we review the Board’s reasoning under the arbi-
    trary and capricious standard and its factual determina-
    tions under the substantial evidence standard.            “A
    reviewing court reviews an agency’s reasoning to deter-
    mine whether it is ‘arbitrary’ or ‘capricious,’ or, if bound
    up with a record-based factual conclusion, to determine
    whether it is supported by ‘substantial evidence.’” Dick-
    inson v. Zurko, 
    527 U.S. 150
    , 164 (1999). See also In re
    Gartside, 
    203 F.3d 1305
    , 1313–14 (Fed. Cir. 2000); Harry
    T. Edwards & Linda A. Elliot, Federal Standards of
    Review: Review of District Court Decisions and Agency
    Actions 167–169 (2007). In concluding that the ’573 and
    ’440 patents claim a method used in a financial product or
    12              SIGHTSOUND TECHNOLOGIES, LLC     v. APPLE INC.
    service, the Board explained that claim 1 of both the ’573
    and ’440 patents is “directed to activities that are finan-
    cial in nature, namely the electronic sale of digital audio.”
    J.A. 554, 988. The Board looked to the specifications,
    which repeatedly refer to electronic “sale,” “purchase,”
    and “money,” e.g., ’573 patent col. 1 ll. 9–14; col. 2 ll. 26–
    30; col. 2 ll. 51–58, and claims 3 and 4 of the ’573 and ’440
    patents respectively, which recite “providing a credit card
    number of the second party . . . so the second party is
    charged money.” J.A. 555, 988. The Board concluded that
    “the electronic sale of something, including charging a fee
    to a party’s account, is a financial activity, and allowing
    such a sale amounts to providing a financial service.” J.A.
    988; accord J.A. 556. The Board’s reasoning is not arbi-
    trary or capricious and its findings are supported by
    substantial evidence.
    The Board next explained that the ’573 and ’440 pa-
    tents do not claim a “technological invention.” J.A. 560,
    994. It found that, while the claims of both the ’573 and
    ’440 patents utilize technical components such as a “first
    memory,” “second memory,” “telecommunications line,”
    “transmitter,” and “receiver,” those components were all
    “generic hardware devices known in the prior art.” J.A.
    559, 992. The Board also found that the combination of
    steps recited in the ’573 and ’440 patents did not amount
    to a technological feature that is novel and non-obvious
    over the prior art, because the steps would have been
    obvious in light of the CompuSonics references. The
    Board explained that “while we agree with Patent Owner
    that the steps in claim 1 must be implemented using the
    recited hardware . . . that does not mean necessarily that
    the patent is for a technological invention because the
    components themselves were known in the art.” J.A. 560,
    993. Finding that the claims merely recited “known
    technologies to perform a method” and the “combination”
    of those technologies would have been obvious, the Board
    SIGHTSOUND TECHNOLOGIES, LLC       v. APPLE INC.           13
    concluded that the ’573 and ’440 patents did not claim a
    “technological invention.” J.A. 559–60, 993–94. The
    Board’s reasoning is not arbitrary or capricious and
    substantial evidence supports its findings here.
    III
    The next question is whether the Board here properly
    construed the relevant claims. The Board applied the
    broadest reasonable interpretation standard, the stand-
    ard adopted by the PTO for AIA post-grant proceedings
    and approved by this court. See 
    Cuozzo, 793 F.3d at 1278
    .
    We also apply the Supreme Court’s decision in Teva
    Pharmaceuticals U.S.A., Inc. v. Sandoz, Inc., 
    135 S. Ct. 831
    , 841 (2015). We review intrinsic evidence and the
    ultimate construction of the claim de novo. See 
    id. We review
    underlying factual determinations concerning
    extrinsic evidence for substantial evidence. 
    Id. Claims 1
    and 4 of the ’573 patent and claims 1, 64,
    and 95 of the ’440 patent include the term “second
    memory,” as in “[a] method for transmitting a desired
    digital audio signal stored on a first memory of a first
    party to a second memory of a second party.” ’573 patent
    col. 6 ll. 4–24 (emphasis added). See also 
    id. col. 6
    ll. 37–
    56; ’440 C1 patent col. 1 ll. 33–64, col. 8 ll. 14–44, col. 13
    ll. 14–51. The two patents have a common specification
    and trace their origin to the same parent application.
    Where multiple patents “derive from the same parent
    application and share many common terms, we must
    interpret the claims consistently across all asserted
    patents.” NTP, Inc. v. Research In Motion, Ltd., 
    418 F.3d 1282
    , 1293 (Fed. Cir. 2005). Here the claim term “second
    memory” should be interpreted the same in the ’573 and
    ’440 patents. The Board construed “second memory” in
    both patents as meaning “a second storage space in a
    computer system or medium that is capable of retaining
    data or instructions.” J.A. 15, 82. The specification notes
    14              SIGHTSOUND TECHNOLOGIES, LLC     v. APPLE INC.
    some disadvantages of the “three basic mediums (hard-
    ware units) of music” then available: “records, tapes, and
    compact discs.” E.g., ’573 patent col. 1 ll. 17–20; ’440
    patent col. 1 ll. 24–26. Addressing the language in the
    specification, the Board appeared to conclude that “second
    memory” would not exclude those three media based on
    the specification, because the Board required a “clear
    disclaimer” in the specification to overcome the ordinary
    meaning and to exclude records, tapes, and CDs. J.A. 13,
    82.
    The Board’s analysis in this respect was incorrect.
    Claims “must be read in view of the specification, of which
    they are a part.” Phillips v. AWH Corp., 
    415 F.3d 1303
    ,
    1315 (Fed. Cir. 2004) (en banc). We have explained that
    the specification is “the single best guide to the meaning
    of a disputed term and that the specification acts as a
    dictionary when it expressly defines terms used in the
    claims or when it defines terms by implication.” 
    Id. at 1321
    (citation and internal quotation marks omitted)
    (emphasis added). Thus “a claim term may be clearly
    redefined without an explicit statement of redefinition.”
    
    Id. (quoting Bell
    Atl. Network Servs., 
    262 F.3d 1258
    , 1268
    (Fed. Cir. 2011)). We followed this approach in In re
    Abbott Diabetes Care Inc., 
    696 F.3d 1142
    (Fed. Cir. 2012),
    where we held that the claim term “electrochemical
    sensor” excluded cables and wires based on critical lan-
    guage in the claims and specification, despite their having
    been no explicit disclaimer of cables or wires. See 
    id. at 1149–50.
    See also Edwards Lifesciences LLC v. Cook Inc.,
    
    582 F.3d 1322
    , 1329 (Fed. Cir. 2009). The disadvantages
    identified by the specification of records, tapes, and CDs
    amount to implied disclaimer of those three media. See,
    e.g., ’573 patent col. 1 ll. 17–20; ’440 patent col. 1 ll. 24–
    26. Thus we disagree with the Board’s interpretation
    insofar as it included records, tapes, and CDs in its con-
    struction of “second memory.”
    SIGHTSOUND TECHNOLOGIES, LLC    v. APPLE INC.             15
    Nonetheless, the Board did not err in rejecting
    SightSound’s contention that floppy disks—a medium
    referenced in the CompuSonics prior art—should also be
    excluded. SightSound contends that the correct construc-
    tion should exclude “all removable memory sharing the
    attributes of the prior art tapes and CDs distinguished in
    the specification and throughout prosecution,” i.e., that it
    should exclude floppy disks. Appellant’s Br. 55 (emphasis
    added). SightSound argues that the specification and
    prosecution histories make clear that a removable “second
    memory” would not fulfill the purpose of the invention to
    overcome the disadvantages of records, tapes, and CDs,
    and therefore the patents expressly disclaimed all remov-
    able memory from the scope of “second memory,” limiting
    it to a non-removable hard disk.
    The Board rejected this argument. The Board found,
    and we agree, that the specification’s description of the
    disadvantages of records, tapes, and CDs does not “indi-
    cate that the identified disadvantages extend to all re-
    movable media or that the disadvantages occur
    specifically because the devices are removable. . . . To the
    contrary, some of the identified disadvantages, like lim-
    ited capacity and playback capability, have nothing to do
    with whether the device can be removed.” J.A. 12, 81.
    The specification suggests that the patent’s objective was
    not to overcome the alleged disadvantages associated with
    the removable nature of the three hardware units, as
    SightSound suggests, but rather to overcome the disad-
    vantages associated with distributing the three types of
    units: “hardware units need to be physically [transferred]
    from the manufacturing facility to the wholesale ware-
    house to [the] retail warehouse to the retail outlet, result-
    ing in [lengthy], lag time between music creation and
    music marketing.” ’573 patent col. 1 ll. 39–43; ’440 patent
    col. 1 ll. 45–49. These disadvantages would not apply to
    storing digitally purchased music on a floppy disk, for
    16              SIGHTSOUND TECHNOLOGIES, LLC    v. APPLE INC.
    example. See ’573 patent col. 1 ll. 39–49; ’440 patent col. 1
    ll. 45–54. Accordingly, SightSound’s reading of “second-
    ary memory” to exclude all removable media is not sup-
    ported by the specification.
    The Board also reviewed the prosecution history and
    found certain statements contradicting SightSound’s
    proposed limitation, including one made by the named
    inventor, Arthur R. Hair, that “[a]ny suitable recording
    apparatus controlled and in possession of the second party
    can be used to record the incoming digital signals.” J.A.
    14. What is more, the original claims expressly recited a
    “hard disk,” but that language was removed in favor of
    the broader term “second memory.” J.A. 15. The Board
    concluded that this “deliberate choice” to use the broader
    term “second memory” instead of the narrower “hard disk”
    strongly supports that the two are not coextensive. Id.;
    see Arlington Indus., Inc. v. Bridgeport Fittings, Inc., 
    632 F.3d 1246
    , 1255 (Fed. Cir. 2011).
    The doctrine of claim differentiation additionally sup-
    ports the Board’s construction that “second memory” is
    not limited to a non-removable hard disk. Claim 1 of the
    ’440 patent recites a method for transferring desired
    digital video or audio signals by “forming a connection
    through telecommunications lines between a first memory
    of a first party and a second memory of a second party
    control unit of a second party.” ’440 C1 patent col. 1
    ll. 34–37. Claim 64 of the ’440 patent contains nearly
    identical language, but adds the following limitation:
    “forming a connection through telecommunications lines
    between a first memory of a first party and a second
    memory of a second party control unit of a second party,
    the second memory including a second party hard disk.”
    ’440 C1 patent col. 8 ll. 16–18 (emphasis added). This
    distinction further underscores that “second memory”
    must be different from a non-removable “hard drive,”
    because otherwise the additional language of claim 64
    SIGHTSOUND TECHNOLOGIES, LLC      v. APPLE INC.           17
    would be redundant. J.A. 79; see Arlington Indus., 
    Inc., 632 F.3d at 1254
    –55. The intrinsic and extrinsic evidence
    both support construing “second memory” as not limited
    to a non-removable hard disk. We see no error in the
    Board’s ultimate conclusion that the term “second
    memory” includes floppy disks.
    IV
    The final question is whether the Board properly
    determined that the claims would have been obvious. We
    review the Board’s factual findings for substantial evi-
    dence and its legal conclusions de novo. 
    Cuozzo, 793 F.3d at 1280
    (citing In re Baxter Int’l, Inc., 
    678 F.3d 1357
    , 1361
    (Fed. Cir. 2012)). The ultimate determination of obvious-
    ness under § 103 is a question of law based on underlying
    factual findings. 
    Id. (citing Graham
    v. John Deere Co.,
    
    383 U.S. 1
    , 17–18 (1966)). What a reference teaches and
    the differences between the claimed invention and prior
    art are questions of fact which we review for substantial
    evidence. 
    Id. The Board
    found that “Apple explains in detail in its
    Petition[s] how the CompuSonics publications teach every
    limitation” of the primary claims. J.A. 31, 54, 98.
    SightSound conceded that the CompuSonics publications
    “describe prior art elements working according to their
    established functions in a predictable manner,” but ar-
    gued that a skilled artisan would have had no reason to
    combine those elements. J.A. 38, 105. The Board rejected
    this argument, finding that the references “expressly
    contemplate that it would be commercially desirable to
    have a system that allowed users to buy” and store music
    and video electronically. J.A. 39, 55, 106. Finding that
    the reason to combine was manifested by the references
    themselves, see Brown & Williamson Tobacco Corp. v.
    Philip Morris Inc., 
    229 F.3d 1120
    , 1125 (Fed. Cir. 2000),
    the Board thus concluded that a person of ordinary skill
    18             SIGHTSOUND TECHNOLOGIES, LLC   v. APPLE INC.
    in the art would have had reason to combine the teach-
    ings of the CompuSonics references.
    As for claims 1, 2, 4, and 5 of the ’573 patent and
    claim 1 of the ’440 patent, SightSound argues that the
    Board erred in rejecting objective indicia of non-
    obviousness. On appeal, SightSound contends only that
    the Board lacked substantial evidence to conclude that
    there was no nexus between the success of the iTunes
    Music Store (“iTMS”) and the claimed invention. To
    establish a proper nexus between a claimed invention and
    the commercial success of a product, a patent owner must
    offer “proof that the sales were a direct result of the
    unique characteristics of the claimed invention—as op-
    posed to other economic and commercial factors unrelated
    to the quality of the patented subject matter.” In re
    Huang, 
    100 F.3d 135
    , 140 (Fed. Cir. 1996). If a product
    both “embodies the claimed features” and is “coextensive”
    with the claims at issue, “a nexus is presumed.” Brown &
    
    Williamson, 229 F.3d at 1130
    . In other words, a nexus
    exists if the commercial success of a product is limited to
    the features of the claimed invention. But “if the com-
    mercial success is due to an unclaimed feature of the
    device” or “if the feature that creates the commercial
    success was known in the prior art, the success is not
    pertinent.” Ormco Corp., 
    463 F.3d 1299
    , 1312 (Fed. Cir.
    2006). Here the Board found that “iTMS embodies nu-
    merous inventions other than the general purchasing and
    downloading of music relied upon by SightSound.” J.A.
    46, 113. The Board further found that SightSound failed
    to offer proof that the commercial success of iTMS is the
    direct result of a unique characteristic of the claimed
    invention, noting that there was “persuasive evidence
    that the commercial success of the iTMS is due to features
    other than those of the claimed methods.” 
    Id. at 47,
    114.
    Specifically, the Board relied on the testimony of
    Lawrence Kenswil, former employee of the Universal
    SIGHTSOUND TECHNOLOGIES, LLC   v. APPLE INC.             19
    Music Group and board member of the Recording Indus-
    try Association of America with over 25 years of experi-
    ence in the music industry, who explained how content
    selection and the user interface were predominantely
    responsible for iTMS’ commercial success. SightSound
    objects to Mr. Kenswil’s reliance on certain other features,
    such as Genius and five-star and song-by-song popularity
    ratings, which were not available until 2008—long after
    the commercial success of iTMS had been established.
    Even putting these features to one side, the Board’s
    findings are supported by substantial evidence because
    the two primary features posited as responsible for the
    commercial success of iTMS—content selection and user
    interface—were present from the beginning. The Board
    found that iTMS was successful largely because of its
    ability to acquire licensed content from the major record
    labels. SightSound admits that its inability to do the
    same was in part responsible for its failed business model.
    We see no error in the Board’s conclusion that claims 1, 2,
    4, and 5 of the ’573 patent and claim 1 of the ’440 patent
    would have been obvious.
    SightSound also argues that the Board erred in find-
    ing that claims 64 and 95 of the ’440 patent would have
    been obvious. Claims 64 and 95 of the ’440 patent recite
    similar limitations to claim 1, but expressly require that
    the digital video or audio signals be stored in a “second
    party hard disk.” SightSound contends that it would not
    have been obvious to employ a hard disk to store pur-
    chased and received digital signals. SightSound acknowl-
    edges that CompuSonics “professional” devices taught
    using a hard disk for a similar purpose, but argues that
    because CompuSonics’ “consumer” devices used only
    floppy disks, a skilled artisan would not have sought a
    hard disk for the patented purposes. Appellant’s Br. 66–
    67.
    20               SIGHTSOUND TECHNOLOGIES, LLC   v. APPLE INC.
    We have explained that that the “mere disclosure of
    more than one alternative” does not amount to teaching
    away from one of the alternatives where the reference
    does not “criticize, discredit, or otherwise discourage the
    solution claimed.” In re Fulton, 
    391 F.3d 1195
    , 1201 (Fed.
    Cir. 2004). The Board here found that the publications
    “do not criticize the use of a hard disk for storing or
    receiving signals,” nor do they indicate that such a use
    “would have been undesirable.” J.A. 125. To the contra-
    ry, the Board found that at least one publication disclosed
    a “benefit to using a hard disk rather than other types of
    storage,” namely, greater storage capacity. 
    Id. Addition- ally,
    the Board found that it would have been obvious to
    utilize a hard disk to store purchased and received digital
    signals because doing so would only require a hard disk to
    function for its known purpose of storing digital data: “we
    do not see sufficient reason why using a hard disk rather
    than a floppy disk would have achieved an unexpected
    result or would have been uniquely challenging or other-
    wise beyond the level of an ordinarily skilled artisan.”
    J.A. 124. The Board’s findings are supported by substan-
    tial evidence. The same secondary considerations of non-
    obviousness apply to claims 64 and 95 of the ’440 patent
    as discussed above, and the Board did not err in conclud-
    ing that claims 64 and 95 of the ’440 patent would have
    been obvious.
    For the foregoing reasons, we affirm the Board’s
    decision.
    AFFIRMED
    COSTS
    Costs to appellee.