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| All Patents in class 310/74 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,216,397 | Feb. 20, 1917 | B.F. Bailey, J.M. Barr, O.S. More, L.G. Long | Induction Motor | induction motors | |
| 1,541,334 | Jun. 09, 1925 | A.J. Dremel | Electric hair clipper | hair clippers | |
| 2,071,953 | Feb. 23, 1937 | T. Schou | Flywheel Type Electric Machine | induction motors | |