| All Patents in class 451/231 |
Patents 1 -
10
of 25
      |
| Picture | Number | Date | Patentee | Title |
 | 46,152 | Jan. 31, 1865 | D. Slate | Improvement in turning-lathes |
 | RE5,236 | Jan. 14, 1873 | P. Schrag, P. Hufeland | Machine for cutting off pencils |
| | RE5,378 | Apr. 29, 1873 | R. Dimes | Processes and Apparatus for Stippling Metallic Surfaces |
| | 196,183 | Oct. 16, 1877 | J.A. Bidwell | Die Grinding Machine |
 | 235,352 | Dec. 14, 1880 | J. Franzmann | Machine for shaping wooden shovels |
| | 542,099 | Jul. 02, 1895 | B. Bloomheart, W.F. Nichols | Grinding Apparatus |
 | 648,648 | May 01, 1900 | H. Allen | Mower-knife grinder |
 | 698,315 | Apr. 22, 1902 | E.S. Shimer, H.A. Pardoe | Grinding-machine |
| | 876,372 | Jan. 14, 1908 | R.C. Matthews | Surface Grinding Machine |
| | 896,357 | Aug. 18, 1908 | R.S. Brown | Machine for Sharpening Cutter Teeth |
