| All Patents in class 451/261 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
| | 359,919 | Mar. 22, 1887 | J.K. Chace | Machine for Scouring Sheet Metal |
| | 389,826 | Sep. 18, 1888 | A.F. Tyler | Machine for smoothing and finishing blind-slats |
| | 484,639 | Oct. 18, 1892 | W.F. Larish | Jointing and sanding machine |
| | 1,416,952 | May 23, 1922 | R.D. Gardner | Ring-grinding machine |
| | 1,563,901 | Dec. 01, 1925 | R.D. Gardner | Grinding machine |
| | 1,659,092 | Feb. 14, 1928 | E.B. Gardner | Ring-grinding machine |
| | 1,670,111 | May 15, 1928 | E.B. Gardner | Grinding machine |
| | 1,784,231 | Dec. 09, 1930 | F.E. Gardner | Grinding machine |
 | 3,151,420 | Oct. 06, 1964 | G.J. Machacek, Jr. | Machine for grinding knives |
 | 4,704,823 | Nov. 10, 1987 | C.I. Steinback | Abrasive surfacing machine |
