Number | Date | Country | Kind |
---|---|---|---|
8001511 | Feb 1980 | SEX |
Number | Name | Date | Kind |
---|---|---|---|
1678278 | Weyandt | Jul 1928 | |
3192488 | Faith et al. | Jun 1965 | |
3430120 | Kotaka et al. | Feb 1969 | |
3751693 | Gabor | Aug 1973 | |
4149807 | Avison et al. | Apr 1979 | |
4276499 | Masuda | Jun 1981 | |
4281263 | Virolleau et al. | Jul 1981 |
Number | Date | Country |
---|---|---|
1145712 | Mar 1963 | DEX |
333972 | Jan 1968 | SEX |
378490 | Jan 1975 | SEX |
Entry |
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IBM Tech. Disclosure, vol. 15, No. 2, Jul. 1972. |