| All Patents in class 451/213 |
Patents 1 -
15
of 91
      |
| Number | Date | Patentee | Title | Type |
| 29,512 | Aug. 07, 1860 | E.W. Nichols | Holder for Polishing-Wheels | bench or pedestal grinders |
| 67,480 | Aug. 06, 1867 | E.C. Atkins | Improvement in machines for grinding saws | tool making machines |
| 68,854 | Sep. 17, 1867 | J.H. Diedrichs, M.A. Diedrichs | Grinding and Polishing Metals | polishing and buffing machinery |
| 70,479 | Nov. 05, 1867 | J.H. Sternbergh | Improvement in Metal Planers | surface grinders |
| 70,483 | Nov. 05, 1867 | A. Thomas | Lathe Way Smoother | surface grinders |
| 81,126 | Aug. 18, 1868 | E. Andrews | Improvement in saw-grinding machines | making sawblades |
| 83,405 | Oct. 27, 1868 | J.L. Otis | Improvement in Grinding Machines | tool grinders |
| 100,089 | Feb. 22, 1870 | G. Walker | Improvement in Saw-Grinding Machine | tool making machines |
| 134,296 | Dec. 24, 1872 | G.W. Libbey | Grinding Machines | grinding machines |
| 139,773 | Jun. 10, 1873 | J.W. Cole | Improvement in machines for forming, shaping, and dressing journal-boxes | machine making |
| 152,323 | Jun. 23, 1874 | C.S. Bement | Improvement in machines for grinding carpenters' squares | tool making |
| 196,183 | Oct. 16, 1877 | J.A. Bidwell | Die Grinding Machine | die grinding machines |
| 197,711 | Nov. 27, 1877 | E.J. Worcester | Improvement in machines for grinding lawn-motor cutter | grinders |
| 350,351 | Oct. 05, 1886 | T.P. Egan, F. Danner | Grinding-machine | sharpening machines |
| 371,847 | Oct. 18, 1887 | J.N. Lapointe | Machine for polishing pinion-leaves | gear making machines |
