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| All Patents in class 192/84.51 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,056,243 | Mar. 18, 1913 | A.W. Whitcomb | Double-acting clutch | metalworking power transmission | |
| 2,695,695 | Nov. 30, 1954 | J.F. Patrick, H.W. Gilfillan | Electromagnetically Operated Clutch or Brake | industrial machine clutches | |