Zelco, Inc. v. Commissioner of Internal Revenue ( 1964 )
Richard J. Borchers Jane E. Borchers v. Commissioner of Internal Revenue ( 1991 )
Jack E. Golsen and Sylvia H. Golsen v. Commissioner of Internal Revenue ( 1971 )
William F. Owen, Jr. Gretchen K. Owen v. Commissioner Internal Revenue Service ( 1989 )
Welch v. Helvering ( 1933 )