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| Patents Granted on 1851-05-13 | |||||
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| Number | Date | Patentee | Title | Type | |
| RE200 | May 13, 1851 | G.H. Corliss | Improvements in Cut-Off and Working the Valves of Steam Engines | steam engines | |
| 8,086 | May 13, 1851 | R. Bixby, C.S. Bixby, J. Garst | Planing-machine | wood planers | |