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| D289262 | Goetz et al. | Apr 1987 | |
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| D355360 | Mund et al. | Feb 1995 | |
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| D371962 | Petruzzi | Jul 1996 | |
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| D390265 | Cheris et al. | Feb 1998 | |
| 2375645 | Gordon | May 1945 | |
| 3902628 | Schurman | Sep 1975 | |
| 3908828 | Lohwasser | Sep 1975 | |
| 4487328 | Wilcox et al. | Dec 1984 | |
| 4640416 | Northrup et al. | Feb 1987 | |
| 4889235 | Hess | Dec 1989 | |
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| 5407074 | Brightbill et al. | Apr 1995 | |
| 5699925 | Petruzzi | Dec 1997 |