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| Patents for Davida J. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 438,861 | Oct. 21, 1890 | E.B. Rich | Saw-swaging machine | saw sharpening machines | |
| 454,917 | Jun. 30, 1891 | H. Phillips | Pipe Wrench | pipe tongs | |