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| Patents for Charles R. Brown | |||||
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| Number | Date | Patentee | Title | Type | |
| 898,996 | Sep. 15, 1908 | G.P. Sprague | Nut Wrench | ratchet wrenches | |
| 898,997 | Sep. 15, 1908 | G.P. Sprague | Nut Wrench | nut wrenches | |