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| All Patents in class 310/402 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,122,633 | Dec. 29, 1914 | E.S. Pillsbury | Dynamo-electric machine | induction motors | |
| 1,852,829 | Apr. 05, 1932 | A.F. Welch | Dynamo electric machine | induction motors | |
| 2,023,259 | Dec. 03, 1935 | G.R. Anderson | Electric Machine | electric motors | |