Number | Date | Country | Kind |
---|---|---|---|
57-209074 | Nov 1982 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2743318 | de Forest | Apr 1956 | |
2889414 | Gratian et al. | Jun 1939 | |
3202771 | Wada | Aug 1965 | |
3384881 | Frost et al. | May 1968 | |
3454727 | Siera et al. | Jul 1969 | |
4138702 | Magnenet | Feb 1979 | |
4253127 | Kodama et al. | Feb 1981 | |
4277809 | Fisher et al. | Jul 1981 | |
4296430 | Warren | Oct 1981 | |
4383284 | Isshiki | May 1983 | |
4385334 | Yanagida | Mar 1983 | |
4441131 | Osanai | Apr 1984 | |
4562503 | Fujioka et al. | Dec 1985 |
Number | Date | Country |
---|---|---|
0033236 | Aug 1981 | EPX |
0053944 | Jun 1982 | EPX |
3120549 | Nov 1982 | DEX |
43-68 | Jan 1968 | JPX |
55-70932 | May 1980 | JPX |
55-160324 | Dec 1980 | JPX |
56-11612 | Feb 1981 | JPX |
56-169218 | Dec 1981 | JPX |
56-169212 | Dec 1981 | JPX |
57-20908 | Feb 1982 | JPX |
58-19715 | Feb 1983 | JPX |
58-164002 | Sep 1984 | JPX |
497800 | Dec 1938 | GBX |
1017223 | Jan 1966 | GBX |
1239918 | Jul 1971 | GBX |
1321940 | Jul 1973 | GBX |
Entry |
---|
Patents Abstracts of Japan, vol. 7, No. 164 (P-211) 1309, Jul. 19th, 1983 (JP-A-58-70414). |
"Electronics"--pp. 131-135, Sep. 22, 1982. |