Appeal No. 79-518. August 9, 1979. Robert A. Felsman, Fort Worth, Tex., atty. of record, for appellants; Dennison, Dennison, Mesorole Pollack, Arlington, Va., of counsel. Joseph F. Nakamura, Washington, D.C., for the Commissioner of Patents; Fred W. Sherling, Associate Solicitor, Washington, D.C., of counsel. Appeal from the Patent and Trademark Office Board of Appeals. Before MARKEY, Chief Judge, RICH, BALDWIN, and MILLER, Judges, and PENN, Judge. The Honorable John G. Penn, United States District