| All Patents in class 451/454 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 97,098 | Nov. 23, 1869 | T. Loring | Improvement in grindstones | sharpening apparatus |
| 425,486 | Apr. 15, 1890 | J.B. Bennett | Adjusting device | sanding machines |
| 434,115 | Aug. 12, 1890 | C.H. Norton | Grinding Machine | grinders |
| 446,148 | Feb. 10, 1891 | A.B. Landis | Grinding-machine | grinders |
| 544,439 | Aug. 13, 1895 | A.B. Landis | Grinding-machine | grinders |
| 801,542 | Oct. 10, 1905 | T.A. Panyard | Grinding and polishing machine | sharpening machines |
| 867,198 | Sep. 24, 1907 | A.E. Thayer, B.M. Hanson | Foot Stock | cylindrical grinders |
| 1,016,751 | Feb. 06, 1912 | A.B. Landis | 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 |
| 1,337,140 | Apr. 13, 1920 | G.C. Kimmel | Grinding Machine | internal grinders |
