Appeal No. 77-532. January 12, 1978. As Amended January 18, 1978. James L. Bailey, Houston, Tex., attorney of record, for appellants. Joseph F. Nakamura, Washington, D.C., for the Commissioner of Patents, Fred W. Sherling, Washington, D.C., of counsel. Appeal from the Patent and Trademark Office. Before MARKEY, Chief Judge, and RICH, BALDWIN, LANE and MILLER, Judges. LANE, Judge. This appeal is from the decision of the Patent and Trademark Office (PTO) Board of Appeals (board) affirming the final