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| All Patents in class 192/45.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 254,283 | Feb. 28, 1882 | L.D. Dana | Friction-clutch | industrial machine clutches | |
| 2,554,990 | May 29, 1951 | L.E. Kilness | Ratchet Mechanism | ratchet wrenches | |
| 2,981,389 | Apr. 25, 1961 | L.E. Kilness | Ratchet Mechanism | ratchet wrenches | |
| 4,924,737 | May 15, 1990 | S.A. Gommow | Positive Drive Ratchet | ratchet wrenches | |