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3737003 | Beals et al. | Jun 1973 | A |
3800903 | Beals et al. | Apr 1974 | A |
4209074 | York | Jun 1980 | A |
4291896 | Koch | Sep 1981 | A |
RE31646 | Beals et al. | Aug 1984 | E |
4664221 | Loney et al. | May 1987 | A |
4682787 | Ruhter et al. | Jul 1987 | A |
4706776 | Hyoki et al. | Nov 1987 | A |
4733745 | Lumpkins | Mar 1988 | A |
4821837 | Fifer | Apr 1989 | A |
5632353 | Kimberley | May 1997 | A |
6523617 | McGugan | Feb 2003 | B2 |
20020166267 | McGugan | Nov 2002 | A1 |