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|---|---|---|---|
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| D356239 | Lin | Mar 1995 | |
| D358310 | Nygards | May 1995 | |
| D361485 | Seltz | Aug 1995 | |
| 668286 | Freese | Feb 1901 | |
| 2138012 | Perr | Nov 1938 | |
| 2438797 | Bagge | Mar 1948 | |
| 2814224 | Allard | Nov 1957 | |
| 3411796 | Decker | Nov 1968 | |
| 3549159 | Kroener | Dec 1970 | |
| 3585885 | Carr | Jun 1971 | |
| 4681056 | Friedle et al. | Jul 1987 | |
| 4730960 | Lewis et al. | Mar 1988 | |
| 4876929 | Kozak | Oct 1989 | |
| 5697269 | Tseng | Dec 1997 | |
| 5921561 | Cedarberg, III | Jul 1999 |