Number | Name | Date | Kind |
---|---|---|---|
3877940 | Ericson | Apr 1975 | |
4511650 | Hirai et al. | Apr 1985 | |
4610957 | Kato et al. | Sep 1986 | |
4657848 | Sato et al. | Apr 1987 | |
4849324 | Aida et al. | Jul 1989 | |
4983494 | Kitaguchi et al. | Jan 1991 | |
5082763 | Kojima et al. | Jan 1992 |
Number | Date | Country |
---|---|---|
2235940 | Oct 1987 | JPX |
Entry |
---|
U.S. Defensive Publication T864,022, Beavers et al., Jul. 1969. |