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| All Patents in class 74/99A | |||||
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| Number | Date | Patentee | Title | Type | |
| 810,642 | Jan. 23, 1906 | W.T. Guchess | Changeable-Speed Gear for Feeder-Aprons | threshers and thrashers | |
| 2,507,167 | May 09, 1950 | D.R. Lemmerman | Rotary Impact Type Turning Tool | screw extractors | |