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| Patents for Rollin Defrees | |||||
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| Number | Date | Patentee | Title | Type | |
| 78,321 | May 26, 1868 | T. Percival | Corn Husker | corn huskers | |
| 642,146 | Jan. 30, 1900 | M.R. Moore | Valve Gear | steam engine valve gear | |