No. 91-1088. March 10, 1993. Jack E. Haken, U.S. Philips Corp., Tarrytown, NY, argued, for appellant. Fred E. McKelvey, Sol., Office of the Sol., Arlington, VA, argued, for appellee. With him on the brief, was Lee E. Barrett, Associate Sol. Appeal from the Patent and Trademark Office Board of Patent Appeals and Interferences. Before ARCHER, PLAGER, and RADER, Circuit Judges. ARCHER, Circuit Judge. Johannes R. Van Geuns appeals from the September 25, 1990 decision of the Patent and Trademark Office