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| All Patents in class 188/164 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,123,404 | Jan. 05, 1915 | W.T. Sears | Shock-absorber | motor vehicles | |
| 2,695,695 | Nov. 30, 1954 | J.F. Patrick, H.W. Gilfillan | Electromagnetically Operated Clutch or Brake | industrial machine clutches | |