Number | Name | Date | Kind |
---|---|---|---|
3800104 | Lien et al. | Mar 1974 | |
3916135 | Holden et al. | Oct 1975 | |
4095059 | Nishioka et al. | Jun 1978 | |
4096364 | Lynn et al. | Jun 1978 | |
4314112 | Misson et al. | Feb 1982 | |
4351988 | Allbright | Sep 1982 | |
4352964 | English | Oct 1982 | |
4378478 | Deeg | Mar 1983 | |
4390765 | Sado et al. | Jun 1983 | |
4430531 | Wright | Feb 1984 | |
4493959 | Viebrantz | Jan 1985 |
Number | Date | Country |
---|---|---|
2058462A | Apr 1981 | GBX |
Entry |
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IBM Tech. Disc. Bull.; D. L. Pierson, "Sloped Key Button", vol. 19, No. 3, 8-1976, pp. 1035, 1036. |