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| Patents for George S. Hanford | |||||
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| Number | Date | Patentee | Title | Type | |
| 87,212 | Feb. 23, 1869 | J.D. Smith | Improvement in Machines for Grinding Edge Tools | tool grinders | |
| 104,744 | Jun. 28, 1870 | J.D. Lathrop | Improvement in engraving-machines | metal engraving machines | |