| All Patents in class 451/121 |
Patents 1 -
15
of 20
      |
| Number | Date | Patentee | Title | Type |
| 151,669 | Jun. 02, 1874 | M. Newman | Improvement in metal shaping and dressing machines | surface grinders |
| 487,140 | Nov. 29, 1892 | C.A. Worden | Machine for sharpening razors | |
| 516,146 | Mar. 06, 1894 | C.A. Worden | Machine for sharpening razors, shears, &c. | |
| 856,662 | Jun. 11, 1907 | G.W. Smith | Face-mill grinder | tool grinders |
| 1,026,022 | May 14, 1912 | W.F. Cremean | Grinding Machine | cylindrical grinders |
| 1,212,214 | Jan. 16, 1917 | J. Halterbeck | Abrading-machine | sanding machines |
| 1,281,512 | Oct. 15, 1918 | J.A. Carothers | Saw Grinding Machine | saw sharpening machines |
| 1,780,886 | Nov. 04, 1930 | J.F. Pribnow, E.F. Mitchell | Circular-saw-sharpening machine | saw sharpening machines |
| 1,849,868 | Mar. 15, 1932 | S. Einstein | Grinder Wheel Oscillator | grinder dressers |
| 1,936,992 | Nov. 28, 1933 | B.D. Pinkney | Sanding machine | sanding machines |
| 2,081,360 | May 25, 1937 | A.W. Mall | Rail slotter | |
| 2,214,141 | Sep. 10, 1940 | A.W. Mall | Rail slotter | |
| 2,286,821 | Jun. 16, 1942 | L.D. Libby | Machine for Cutting Dies and the Like | milling machines |
| 2,335,625 | Nov. 30, 1943 | J.C. Wilson | Grinding Machine | grinders |
| 2,381,687 | Aug. 07, 1945 | E.A. Allen, R.S. Pyne | Drive for oscillating grinders | grinders |
