| All Patents in class 451/221 |
Patents 1 -
15
of 68
      |
| Number | Date | Patentee | Title | Type |
| 63,773 | Apr. 09, 1867 | B.D. Whitney | Grinding cylinder saws | saw sharpening machines |
| 70,788 | Nov. 12, 1867 | T. Birch, A. Sowden | Improvement in grinding machine for circular saws | making sawblades |
| 76,301 | Apr. 07, 1868 | E. Carrington, E.O. Carrington | Improvement in Machine for Grinding and Cutting Down Augers | making drills and augers |
| 164,897 | Jun. 22, 1875 | A. Wood | Machine for Grinding Pulleys | cylindrical grinders |
| 187,770 | Feb. 27, 1877 | L. Sharpe, executor, C.D. Owen, executor, J.R. Brown (deceased), estate of | Grinding Machine | cylindrical grinders |
| 265,581 | Oct. 10, 1882 | E.R. Cheney | Stone Lathe | stoneworking lathes |
| 532,532 | Jan. 15, 1895 | D.H. Church | Staff Turning Lathe | watchmakers lathes |
| 626,337 | Jun. 06, 1899 | C.H. Norton | Grinding-Machine | cylindrical grinders |
| 731,087 | Jun. 16, 1903 | Z.R. Tucker | Carriage Reversing Mechanism for Grinding Machines | cylindrical grinders |
| 1,249,632 | Dec. 11, 1917 | H.R. Isler | Grinding-machine | surface grinders |
| 1,262,540 | Apr. 09, 1918 | J. Miller | Grinding Machine | grinding machines |
| 1,267,534 | May 28, 1918 | W.F. Fraser | Grinder | |
| 1,287,731 | Dec. 17, 1918 | F. Müller | Automatic Grinding Machine | grinders |
| 1,288,998 | Dec. 24, 1918 | E. Rivett | Grinding Machine | grinding machines |
| 1,290,896 | Jan. 14, 1919 | W.L. Bryant | Machine for grinding metal | cylindrical grinders |
