Number | Name | Date | Kind |
---|---|---|---|
3221111 | Groot et al. | Nov 1965 | |
3629780 | Burcham | Dec 1971 | |
4405841 | Van Zeeland | Sep 1983 | |
4539440 | Sciarra | Sep 1985 | |
4634815 | Marquis | Jan 1987 | |
4710961 | Buttner | Dec 1987 | |
4918264 | Yamamoto et al. | Apr 1990 | |
4922540 | Erbe | May 1990 |
Entry |
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Operating Principle regarding Dyna-Graphics Membrane Switch--Jun. 1992. |