Number | Date | Country | Kind |
---|---|---|---|
3415741 | Apr 1984 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2523184 | Beall | Sep 1950 | |
3202779 | Call | Aug 1965 | |
3716178 | Shimmin | Feb 1973 | |
4111565 | Jagger | Sep 1978 |
Number | Date | Country |
---|---|---|
2525263 | Oct 1981 | DEX |
Entry |
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W. M. Davis, Trailing Edge Sensor, IBM Technical Disclosure Bulletin, vol. 7, No. 5, Oct. 1964. |