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| All Patents in class 192/55.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,471,226 | Oct. 16, 1923 | J. Whisler | Clutch | friction clutches | |
| 2,826,107 | Mar. 11, 1958 | R.G. Woods | Ratcheting Torque-Limiting Wrench | ratchet wrenches | |