Number | Name | Date | Kind |
---|---|---|---|
3397256 | Paul et al. | Aug 1968 | |
3488700 | Iken et al. | Jan 1970 | |
3809525 | Wang et al. | May 1974 | |
4354829 | Estes | Oct 1982 | |
4741694 | Mason et al. | May 1988 | |
5007823 | Mayotte et al. | Apr 1991 | |
5372458 | Flemmer et al. | Dec 1994 | |
5431559 | Taylor | Jul 1995 | |
5572938 | Leger | Nov 1996 | |
5580237 | Leger | Dec 1996 | |
5762486 | Leger | Jun 1998 |
Entry |
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