| Number | Name | Date | Kind |
|---|---|---|---|
| D254189 | Prosky | Feb 1980 | |
| D254779 | Sulek et al. | Apr 1980 | |
| D287473 | Ueno | Dec 1986 | |
| D287829 | Osaka | Jan 1987 | |
| D298219 | Muller | Oct 1988 | |
| D309866 | Fukuda et al. | Aug 1990 | |
| D337533 | Zaragoza | Jul 1993 | |
| 2797682 | Kannenberg | Jul 1957 | |
| 3221555 | Biber | Dec 1965 | |
| 3576129 | Crites | Apr 1971 | |
| 3946613 | Silver | Mar 1976 | |
| 4054057 | Kluge | Oct 1977 | |
| 4072054 | Blouin et al. | Feb 1978 | |
| 4159648 | Prosky | Jul 1979 | |
| 4159766 | Kluge | Jul 1979 | |
| 4166389 | Montren | Sep 1979 | |
| 4317367 | Schonberger | Mar 1982 | |
| 4341992 | Goldstein | Jul 1982 | |
| 4444517 | Murase | Apr 1984 | |
| 4688949 | Hatakenaka | Aug 1987 | |
| 4692034 | Fukui et al. | Sep 1987 | |
| 4729672 | Takagi | Mar 1988 | |
| 4743121 | Takagi et al. | May 1988 | |
| 5013161 | Zaragoza et al. | May 1991 | |
| 5165798 | Watanabe | Nov 1992 |