Number | Date | Country | Kind |
---|---|---|---|
89117900.4 | Sep 1989 | EPX |
Number | Name | Date | Kind |
---|---|---|---|
3828236 | Close | Aug 1974 | |
3859581 | Gardner | Jan 1975 | |
4603286 | Sakano | Jul 1986 | |
4769583 | Goor | Sep 1988 |
Entry |
---|
Patent Abstracts of Japan, vol. 12, No. 408 p. 778, 28 Oct. 1988 & JP-A-63-146105 (Mitsubishi Electronic Corp.) 18 Jun. 1988. |