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Patents for James B. Johnson | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 76,328 | Apr. 07, 1868 | W.H. Birch, J.B. Johnson | Improvement in friction-clutch | |
![]() | 138,256 | Apr. 29, 1873 | J.B. Johnson | Improvement in Files |