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| All Patents in class 318/776 | |||||
| Number | Date | Patentee | Title | Type | |
| 1,795,063 | Mar. 03, 1931 | H. Weichsel | Alternating-current motor | AC motors | |
| 1,870,272 | Aug. 09, 1932 | H. Weichsel | Alternating current motor | AC motors | |