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| Patents for A. C. Depew | |||||
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| Number | Date | Patentee | Title | Type | |
| 288,770 | Nov. 20, 1883 | R.H. Brown | Calipers | calipers | |
| 288,771 | Nov. 20, 1883 | R.H. Brown | Calipers | calipers | |