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| All Patents in class 192/70.3 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 808,975 | Jan. 02, 1906 | H.G. Dittbenner | Friction-clutch | |
| 834,857 | Oct. 30, 1906 | T.H. Worrall | Clutch | ||
| 835,373 | Nov. 06, 1906 | H.R. Stacks | Friction-clutch | ||
 | 890,810 | Jun. 16, 1908 | H.R. Stacks | Friction-clutch | |
 | 924,397 | Jun. 08, 1909 | H.R. Stacks | Friction-clutch | |
| 924,850 | Jun. 15, 1909 | G.W. Starr | Friction Clutch | ||
| 1,878,149 | Sep. 20, 1932 | H.L. Johnston | Mixing machine | ||