Number | Date | Country | Kind |
---|---|---|---|
89 13923 | Oct 1989 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
4067852 | Calundann | Jan 1978 | |
4161470 | Calundann | Jul 1979 | |
4265802 | Choe | May 1981 | |
4868271 | Dahl et al. | Sep 1989 |
Number | Date | Country |
---|---|---|
2058102 | Apr 1981 | GBX |
Entry |
---|
Patent Abstracts of Japan, vol. 5, No. 4 (C-38) [676], Jan. 13, 1981. |
Patent Abstracts of Japan, vol. 12, No. 344 (C-528) [3191], Sep. 16, 1988. |