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| All Patents in class 12/21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,255X | Oct. 25, 1832 | S. Knowlton | Machine for hardening taps for soles of boots and shoes | cobbler | |
| 121,389 | Nov. 28, 1871 | N. Linsley | Improvement in Machines for Rolling Leather | leatherworker | |
| 1,994,510 | Mar. 19, 1935 | A.F. Froussard | Shoe Sole Machine | shoe and boot making machines | |