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| Patents for Joseph Powell | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,983 | Feb. 27, 1847 | J. Powell, N. Barlow, E. Holden | Machine for planing, tonguing and grooving | wood planers | |
| 7,557 | Aug. 13, 1850 | N. Barlow | Friction-clutch | industrial machine clutches | |
| RE210 | Mar. 09, 1852 | J. Powell, N. Barlow, E. Holden | Planer matcher | wood planers | |