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| All Patents in class 192/109R | |||||
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| Number | Date | Patentee | Title | Type | |
| 232,884 | Oct. 05, 1880 | J.H. Cox | Pawl Shifter for Traction Engines | traction engine propulsion components | |
| 529,755 | Nov. 27, 1894 | E.D. Schmidt | Friction Clutch | industrial machine clutches | |
| 843,076 | Feb. 05, 1907 | J.S. Detrick | Clutch Operating Mechanism | industrial machine clutches | |
| 923,930 | Jun. 08, 1909 | H. Baerbalck | Metal-planer | metal planers | |
| 1,172,410 | Feb. 22, 1916 | W.E. Villinger | Clutch-controlling means | motor vehicles | |