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| Patents Granted on 1845-01-31 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,897 | Jan. 31, 1845 | A.A. Wilder | Machine for drilling and mortising wood or metal | drilling and boring | |
| 3,899 | Jan. 31, 1845 | W.N. Clark | Single-Twist Auger, Gimlet, &c. | auger bits | |