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| Patents for M. G. Norton | |||||
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| Number | Date | Patentee | Title | Type | |
| 257,468 | May 09, 1882 | M.E. Campfield | Wrench | screw adjust wrenches | |
| 303,385 | Aug. 12, 1884 | M.E. Campfield | Making Screws For Monkey Wrenches | wrench components | |