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| Patents for Theodore P. Farmer | |||||
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| Number | Date | Patentee | Title | Type | |
| 167,884 | Sep. 21, 1875 | T.P. Farmer | Improvement in Countersinks | countersinks | |
| 240,984 | May 03, 1881 | T.P. Farmer | Art of Manufacturing Twist Drills | making drills and augers | |