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| Patents Granted on 1842-02-01 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,440 | Feb. 01, 1842 | H. Aiken | Improvement in machines for excavating ditches | ||
| 2,443 | Feb. 01, 1842 | R. Cook | Manufacture of Wrought-Iron and Steel Cannons | ||
| 2,444 | Feb. 01, 1842 | S.E. Burnham, R. Cook | Mode of straining saws for sawmills | reciprocating sawmills | |