Appeal No. 1997-3868 Page 3 Application No. 08/538,838 Staats 4,056,422 Nov. 01, 1977 Kasper et al. (Kasper) 4,759,816 Jul. 26, 1988 Nath et al. (Nath) 5,238,519 Aug. 24, 1993 Watkin 2,042,802 Sep. 24, 1980 (Published British patent application)Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 NextLast modified: November 3, 2007