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| Patents for F. M. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 473,007 | Apr. 19, 1892 | C. Leach | Wrench | screw adjust wrenches | |
| 490,789 | Jan. 31, 1893 | W.H. Huston | Combination Wrench | combination tools | |
| 494,161 | Mar. 28, 1893 | W. Rankin | Combination Tool | pliers | |
| 525,435 | Sep. 04, 1894 | M. Wenger | Wrench | quick adjust wrenches | |