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| Patents for J. D. Hancock | |||||
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| Number | Date | Patentee | Title | Type | |
| 38,200 | Apr. 14, 1863 | W. Bullock | Printing-machine | printing presses | |
| 39,288 | Jul. 21, 1863 | C.W. Harris | Improved Bung Cutter | drill bits | |