| All Patents in class 451/273 |
Patents 1 -
15
of 37
      |
| Number | Date | Patentee | Title | Type |
| 2,329 | Nov. 03, 1841 | T.J. Cornell | Machine for Dressing Granite | stone cutting machines |
| 45,679 | Dec. 27, 1864 | P. Schrag | Improvement in machines for sandpapering pencils | sanding machines |
| 98,850 | Jan. 18, 1870 | H. Harpin, J. Coulter | Stone Dressing Machine | stone dressing machines |
| 108,822 | Nov. 01, 1870 | J.S. Lane, J.H. Pitkin | Machine for Grinding and Polishing Metal | polishing and buffing machinery |
| 178,398 | Jun. 06, 1876 | P. Barker | Sandpapering-machine | sanding machines |
| 182,284 | Sep. 19, 1876 | J.L. Otis | Planer-knife grinder | tool grinders |
| 238,366 | Mar. 01, 1881 | W.H. Doane | Grinding machine | sharpening machines |
| RE9,847 | Aug. 23, 1881 | P. Barker | Sandpapering-machine | sanding machines |
| 271,966 | Feb. 06, 1883 | C.V. Woerd | Apparatus for Grinding Lathe Cutters | tool grinders |
| 420,022 | Jan. 21, 1890 | W.F. Steinhoff | Grinding-machine | sharpening machines |
| 427,477 | May 06, 1890 | J.H. Lawles | Machine for Grinding Pearls Ivory Etc | material grinding machines |
| 465,478 | Dec. 22, 1891 | A. Johnston | Grinding Machine | sharpening apparatus |
| 504,000 | Aug. 29, 1893 | M.M. Aust, C.P. Thiel | Machine for Grinding Thread Cutting Tools | tool grinders |
| 507,634 | Oct. 31, 1893 | S.C. Rogers | Knife-grinder | sharpening machines |
| 614,247 | Nov. 15, 1898 | H. Goldsmith, E.T. Goodhew | Grinding Machine | tool grinders |
