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| All Patents in class 200/290 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,682,790 | Sep. 04, 1928 | J.T. Janette | Electrical contact | electrical connectors | |
| 1,839,095 | Dec. 29, 1931 | E.F. Goetz | Detachable contact | motor controls | |