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| All Patents in class 310/51 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,108,568 | Aug. 25, 1914 | V.A. Fynn | Dynamo-electric machine | electric motors | |
| 1,823,555 | Sep. 15, 1931 | J.M. Naul | Electric phonograph motor | ||
| 2,136,301 | Nov. 08, 1938 | J.S. Hoddy, G.W. Hoddy | Dynamo-electric machine | ||
| 2,696,569 | Dec. 07, 1954 | H.W. Schumann | Motor Tool | handheld grinders | |
| 2,779,883 | Jan. 29, 1957 | H.W. Schumann | Motor tool | handheld power tools | |
| 2,847,593 | Aug. 12, 1958 | L.G. Selbach, H.C. Bodine | Electric motor | motor bearings | |