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| Patents for Oliver B. North | |||||
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| Number | Date | Patentee | Title | Type | |
| 172,155 | Jan. 11, 1876 | O.B. North | Wrench | quick adjust wrenches | |
| 186,155 | Jan. 09, 1877 | O.B. North | Wrench | screw adjust wrenches | |