Number | Name | Date | Kind |
---|---|---|---|
1043561 | Ayer | Nov 1912 | |
3562114 | Steidl et al. | Feb 1971 | |
4250266 | Wade | Feb 1981 | |
4384193 | Kledzik et al. | May 1983 | |
4985206 | Bousman et al. | Jan 1991 | |
5266272 | Griner et al. | Nov 1993 |
Entry |
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helicoView.TM. Product Literature, Gi Supply (no date). |