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| Patents Granted on 1843-04-10 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,039 | Apr. 10, 1843 | W.S. Rider, A.K. Rider | Rotary steam-engine | rotary steam engines | |
| 3,042 | Apr. 10, 1843 | J. Nasmyth | Machinery or apparatus operated by steam for forging, stamping, and cutting iron and other substances | steam hammers | |