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| All Patents in class 310/216.074 | |||||
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| Number | Date | Patentee | Title | Type | |
| 491,970 | Feb. 14, 1893 | A.W. Meston | Electric motor | electric motors | |
| 1,123,319 | Jan. 05, 1915 | F.R. Kunkel | Dynamo-electric machine | induction motors | |