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| All Patents in class 192/219 | |||||
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| Number | Date | Patentee | Title | Type | |
| 843,253 | Feb. 05, 1907 | W.A. Barker | Friction-lock | steering apparatus | |
| 1,971,955 | Aug. 28, 1934 | W.G. Hoelscher | Reversing Gear and Clutch Mechanism | metalworking power transmission | |