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| Patents for Joseph R. Brown | |||||
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| Number | Title | Classification(s) | |||
| 42,525 | Friction Clutch | 192/76 | |||
| 45,294 | Improved Cutter for Cutting Gear-Wheels | 407/29 | |||
| 46,521 | Improved Milling Machine | 144/134.1, 409/228, 74/813R | |||
| 51,257 | Screw Cutting Machine | 470/83 | |||
| 56,495 | Improvement in Making Gear-Cutters | 76/115 | |||