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| Patents for John C. Palmer | |||||
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| Number | Date | Patentee | Title | Type | |
| RE72 | Jul. 30, 1845 | E. L'Hommedieu | Improvement in machinery for manufacturing double-twist screw-augers | drill bits | |
| 484,668 | Oct. 18, 1892 | R. Parsons | Lathe Dog | lathe dogs | |