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| All Patents in class 192/30W | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,596,132 | Aug. 17, 1926 | L.M. Waite | Clutch mechanism | |
| 1,938,780 | Dec. 12, 1933 | B. Sassen, L.F. Nenninger | Power Operated Clutch for Machine Tools | ||
| 2,522,206 | Sep. 12, 1950 | J.B. Armitage | Transmission Control Mechanism | ||