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| All Patents in class 310/227 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,115,406 | Oct. 27, 1914 | J.L. Davis | Dynamo-electric machine | electric motors | |
| 1,594,150 | Jul. 27, 1926 | J. Burke | Current-collecting device | motor cooling | |
| 2,301,156 | Nov. 03, 1942 | G.D. Behlen | Ventilation system for portable power tools | handheld power tools | |
| 2,541,235 | Feb. 13, 1951 | J.D. Gayer | Fan arrangement for electrical devices | motor cooling | |
| 2,624,855 | Jan. 06, 1953 | J.D. Gayer | Fan arrangement for electrical devices | motor cooling | |