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| Patents for John Sofge | |||||
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| Number | Date | Patentee | Title | Type | |
| 457,368 | Aug. 11, 1891 | J. Sofge, G.W. Passel | Mortising machine | mortising machines | |
| 499,014 | Jun. 06, 1893 | W.H. Doane, J. Sofge | Sandpapering machine | sanding machines | |
| 532,035 | Jan. 08, 1895 | W.H. Doane, J. Sofge | Mortising-machine | mortising machines | |