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| All Patents in class 192/111.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,753,085 | Apr. 01, 1930 | J.L. Peterson | Clutch | drill presses | |
| 2,446,363 | Aug. 03, 1948 | E.W. Daum | Combination positive clutch and torque responsive friction coupling | handheld power tools | |
| 2,695,695 | Nov. 30, 1954 | J.F. Patrick, H.W. Gilfillan | Electromagnetically Operated Clutch or Brake | industrial machine clutches | |