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| All Patents in class 451/912 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 236,475 | Jan. 11, 1881 | J.A. Ambler, A.C. Ambler | Mechanism for finishing the bottoms of boots and shoes | |
 | 426,860 | Apr. 29, 1890 | S. Ross, Jr. | Sand-paper machine for boots or shoes | |