Number | Date | Country | Kind |
---|---|---|---|
2-163420 | Jun 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3486032 | Cufflin | Dec 1969 | |
3508066 | Agar | Apr 1970 | |
4333008 | Misek | Jun 1982 | |
4470696 | Ballard | Sep 1984 | |
5038030 | Hayashi et al. | Aug 1991 |
Entry |
---|
"Electronics", Ohm Publishing Co., Ltd., Jan. 1984, pp. 73-76. |