| Number | Name | Date | Kind |
|---|---|---|---|
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| D321525 | Izumi et al. | Nov 1991 | |
| D323523 | Tanaka et al. | Jan 1992 | |
| D329864 | Kawagoe | Sep 1992 | |
| D345987 | Nihei | Apr 1994 | |
| D345988 | Nojima et al. | Apr 1994 | |
| D346176 | Nihei | Apr 1994 | |
| 1196209 | Clark et al. | Aug 1916 | |
| 3958260 | Nagasaka | May 1976 | |
| 5329330 | Sakai et al. | Jul 1994 | |
| 5400098 | Rydelek | Mar 1995 |