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| All Patents in class 192/70.14 | |||||
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| Number | Date | Patentee | Title | Type | |
| 482,326 | Sep. 06, 1892 | W.A. Wilkinson | Friction-clutch | metalworking power transmission | |
| 924,397 | Jun. 08, 1909 | H.R. Stacks | Friction-clutch | industrial machine clutches | |