Number | Date | Country | Kind |
---|---|---|---|
60-210763 | Sep 1985 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3582947 | Harrison | Jun 1971 | |
3624500 | Patzelt | Nov 1971 | |
4125896 | Metcalf | Nov 1978 | |
4404546 | Hata et al. | Sep 1983 |
Entry |
---|
Aasnaes, "Electronics", Apr. 29, 1968, pp. 70-72. |