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