| Number | Name | Date | Kind |
|---|---|---|---|
| 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 |