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| Patents for J. G. Hoffman Mfg Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 293,360 | Feb. 12, 1884 | J.R. Rowlands | Driving Mechanism for Fan Blowers | blacksmith | |
| 307,229 | Oct. 28, 1884 | J.R. Rowlands | Bolt Cutter | blacksmith | |
| 310,681 | Jan. 13, 1885 | G. Weber, J.G. Hoffman | Mechanisn for Operating Fan Blowers | blacksmith | |