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|---|---|---|---|
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| D306339 | Slovak | Feb 1990 | |
| D314607 | Kapec et al. | Feb 1991 | |
| D327468 | Dea et al. | Jun 1992 | |
| D328777 | Thalmann et al. | Aug 1992 | |
| D332993 | Dea et al. | Feb 1993 | |
| D352090 | Dea et al. | Nov 1994 | |
| D353440 | Ito et al. | Dec 1994 | |
| 2565273 | Shuler et al. | Aug 1951 | |
| 5039930 | Collier et al. | Aug 1991 | |
| 5077513 | Dea et al. | Dec 1991 | |
| 5091081 | Hilgren | Feb 1992 | |
| 5100562 | Proctor | Mar 1992 | |
| 5167826 | Eaton | Dec 1992 | |
| 5262013 | Beal et al. | Nov 1993 |