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| Patents for Hiram Knapp | |||||
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| Number | Date | Patentee | Title | Type | |
| 124 | Feb. 10, 1837 | E. Fairbanks, T. Fairbanks | Weighing Heavy Bodies | scales and balances | |
| 6,755 | Oct. 02, 1849 | W.A. Chapin | Varying the Speed of Mandrels in Lathes | metal lathes | |