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| All Patents in class 192/69.81 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 217,787 | Jul. 22, 1879 | F.L. Fairchild | Traction Engine | ||
 | 1,014,481 | Jan. 09, 1912 | C.A. Juengst | Clutch | |
| 1,669,006 | May 08, 1928 | H.L. Johnston | Clutch mechanism | ||
| 1,904,563 | Apr. 18, 1933 | R.W. Strout | Positive-action clutch | ||