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| Patents for John Colby | |||||
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| Picture | Number | Date | Patentee | Title | |
| 4,030X | Feb. 16, 1825 | J. Colby | Making stove pipe | ||
 | 3,687 | Jul. 30, 1844 | R.M. Hoe | Improvement in printing-presses | |
 | 20,052 | Apr. 27, 1858 | N.F. English | Hatchet | |