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| All Patents in class 310/68B | |||||
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| Number | Date | Patentee | Title | Type | |
| 809,394 | Jan. 09, 1906 | A. Pedersen | Electrically-operated portable drill | handheld power tools | |
| 1,548,020 | Aug. 04, 1925 | S.D. Black, A.G. Decker | Reversing means for electric tools | handheld power tools | |
| 1,751,781 | Mar. 25, 1930 | T.C. Weiss | Motor driven tools switch | handheld power drills | |
| 1,772,655 | Aug. 12, 1930 | J.H. Yeager | Dynamo-electric machine | electric motors | |