| All Patents in class 451/215 |
Patents 1 -
8
of 8
      |
| Picture | Number | Date | Patentee | Title |
 | 9,976 | Aug. 30, 1853 | S. Darling | Apparatus for Grinding & Shaping Metals |
 | 18,509 | Oct. 27, 1857 | G.F. Butterfield, D. Lovejoy | Grinding and polishing metal |
 | 81,608 | Sep. 01, 1868 | J.P. Curtiss | Machine for Grinding Metal Articles |
| | 1,717,899 | Jun. 18, 1929 | G.D. Sundstrand | Grinding Machine |
 | 2,019,677 | Nov. 05, 1935 | G.T. Huxford | Surface grinder |
| | 2,127,877 | Aug. 23, 1938 | G.F. Maglott | Grinding Machine |
| | 2,360,671 | Oct. 17, 1944 | A.C. Janke, C.O. Graves, F.S. Haas | Surface Grinder |
| | 2,386,283 | Oct. 09, 1945 | E.A. Reibig, C.A. Wiken | Machine tool |
