Patent Number : 5 , 800 , 800 45 Date of Patent : Sep . 1 , 1998

11/1972 Argauer et al.. f1973 Chu. 8/1978 Rollmann et al. . 4,151,189 4/1979 Rubin et al.. 4,391,785 7/1983 Rosinski et al.. 4,619,820 10/1986 Walyocsik. 4,910,006 3/1990 Zones et al.. 5,057,296 10/1991. Beck. 5,098,684 3/1992 Kresge. 5,102,643 4/1992 Kresge. 5,143,879 9/1992 Whitehurst. 5,334,368 8/1994. Becket al. ............ 5,593,655 1/1997 Jongkind et al. 5,637,287 6/1997 Waughan et al. ...................