| Patents Granted on 1842-02-?? |
Patents 1 -
7
of 7
      |
| 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 |
| 2,453 | Feb. 07, 1842 | J. Walter, L.D. Walter | Machine for Making Screws | screw machines |
| 2,457 | Feb. 12, 1842 | A. Kinney | Machine for cutting shingles | shingle machines |
| 2,459 | Feb. 12, 1842 | W. Murray, J. Murray | Machine for breaking and grinding corn and corncobs | corn grinders |
| 2,467 | Feb. 21, 1842 | A. Ralston | Grain Separator | corn and grain separators |
