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| Patents for F. A. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 475,427 | May 24, 1892 | E.J. Woolf | Single Cylinder Compound Engine | steam engines | |
| 1,008,126 | Nov. 07, 1911 | O.J. Fairchild | Drill Point Gage | gauges | |