Number | Name | Date | Kind |
---|---|---|---|
2500447 | Bitzer | Mar 1950 | |
2984126 | Feaster | May 1961 | |
3173525 | Hergert | Mar 1965 | |
3387689 | Ovshinsky | May 1968 | |
3396610 | Rich, Jr. et al. | Aug 1968 | |
3473639 | Becker et al. | Oct 1969 | |
3589485 | Kajitani et al. | Jun 1971 | |
3600616 | Yokoyama | Aug 1971 | |
3752010 | Tipping | Aug 1973 |
Number | Date | Country |
---|---|---|
1585981 | Feb 1970 | DEX |
2801812 | Jul 1979 | DEX |
590050 | Jun 1925 | FRX |
Entry |
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Patent Abstracts of Japan vol. 5, No. 158, 12 Oct. 1981, JP-A-56-86260. |