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| Patents Granted on 1842-03-09 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,481 | Mar. 09, 1842 | H.H. Herrick | Machine for cutting shingles | shingle machines | |
| 2,485 | Mar. 09, 1842 | P.H. Green, H.H. Evarts | Construction of rotary engines to be propelled by either water or steam | steam engines | |