| All Patents in class 451/154 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 395,615 | Jan. 01, 1889 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| 498,240 | May 30, 1893 | R. Conrader | Reamer Grinding Machine | tool grinders |
| 548,051 | Oct. 15, 1895 | A. Hartley | Grinder | tool grinders |
| 1,026,389 | May 14, 1912 | E.J. McClellan, G.K. Garvin | Hole Grinding Machine | grinding machines |
| 1,999,778 | Apr. 30, 1935 | F.S. Haas, W. Peaslee | Grinding Machinery | grinding machines |
| 2,170,494 | Aug. 22, 1939 | A.H. Dall, H. Ernst | Grinding Machine | grinding machines |
| 2,268,028 | Dec. 30, 1941 | W.M. Fairbairn | Honing machine | honing machines |
