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D334841 | Schmitt, Sr. | Apr 1993 | |
3298211 | Russell et al. | Jan 1967 | |
4732023 | Shen | Mar 1988 | |
5161397 | Raybary | Nov 1992 | |
5176015 | Sussina | Jan 1993 | |
5325690 | Adler et al. | Jul 1994 | |
5431034 | Fann et al. | Jul 1995 | |
5813260 | Widen | Sep 1998 |