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| Patents for Benjamin B. Powell | |||||
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| Number | Date | Patentee | Title | Type | |
| 276,463 | Apr. 24, 1883 | B.B. Powell | Speed Changing Mechanism | industrial machine speed and direction changing mechanisms | |
| 324,955 | Aug. 25, 1885 | B.B. Powell | Speed Changing Mechanism | metalworking variable speed mechanisms | |