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| Patents Granted on 1851-03-11 | |||||
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| Number | Date | Patentee | Title | Type | |
| 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 | ||
| 7,979 | Mar. 11, 1851 | G.F. Woolston | Teeth of saws | saw teeth | |