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| D366198 | Laib | Jan 1996 | |
| D389712 | Usbeck | Jan 1998 | |
| D397010 | Usbeck | Aug 1998 | |
| D404271 | Allendorf et al. | Jan 1999 | |
| D412094 | Weibel | Jul 1999 | |
| 2522219 | Gaeta | Sep 1950 | |
| 4377096 | Allen | Mar 1983 | |
| 4658678 | Pracht | Apr 1987 | |
| 4756214 | Valtri et al. | Jul 1988 | |
| 5351579 | Metz et al. | Oct 1994 | |
| 5361652 | Andina | Nov 1994 |