| Patents Granted on 1851-03-?? |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 7,964 | Mar. 04, 1851 | H. Waterman | Variable Cut-Off Regulated by the Governor | steam engine governors |
| 7,965 | Mar. 11, 1851 | L. Briggs, Jr. | Method of Adjusting the Stroke of Trip-Hammers | trip and helve hammers |
| 7,972 | Mar. 11, 1851 | J.W. Fowle | Steam drilling-machine | mining apparatus |
| 7,977 | Mar. 11, 1851 | T.R. Way, M. Way | Machine for turning, boring, &c. | carriage maker |
| 7,978 | Mar. 11, 1851 | A.A. Wilder | Copying-press | copy presses |
| 7,979 | Mar. 11, 1851 | G.F. Woolston | Teeth of saws | saw teeth |
| 8,000 | Mar. 25, 1851 | N. Lamson | Scythe | |
