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| Patents for A. A. Collins | |||||
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| Picture | Number | Date | Patentee | Title | |
 | RE4,262 | Feb. 14, 1871 | N. Millington | Improvement in Machines for Figuring Carpenters' Squares | |
| 282,809 | Aug. 07, 1883 | O.S. Walker | Ratchet Drill | ||