Number | Name | Date | Kind |
---|---|---|---|
2650590 | Moore et al. | Sep 1953 | |
3654669 | Fulton | Apr 1972 | |
4071023 | Gregory | Jan 1978 | |
4854138 | Charland | Aug 1989 | |
4909051 | Lee | Mar 1990 | |
4910831 | Bingold | Mar 1990 | |
4964419 | Karriker | Oct 1990 | |
5088158 | Burkholder | Feb 1992 |