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| Patents for James B. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 76,328 | Apr. 07, 1868 | W.H. Birch, J.B. Johnson | Improvement in friction-clutch | hoists, winches, come-alongs | |
| 138,256 | Apr. 29, 1873 | J.B. Johnson | Improvement in Files | files | |