| All Patents in class 451/246 |
Patents 16 -
30
of 47
      |
| Number | Date | Patentee | Title | Type |
| 667,579 | Feb. 05, 1901 | A. Roemisch | Apparatus for Grinding and Smoothing Glass | |
| 1,130,454 | Mar. 02, 1915 | J. Wegner | Shaping Machine | |
| 1,227,304 | May 22, 1917 | H.A. Pedrick | Ring-cutting machine | metal lathes |
| 1,323,452 | Dec. 02, 1919 | S.A. Cogsdill | Machine for Grinding Tools | tool grinders |
| 1,544,287 | Jun. 30, 1925 | C.E. Van Norman | Grinding machine | cylindrical grinders |
| 1,709,671 | Apr. 16, 1929 | B.A. Kearns | Grinding Machinery | grinding machines |
| 1,749,328 | Mar. 04, 1930 | A. Turner, S. Einstein | Dead-Center Grinder | grinding machines |
| 1,798,059 | Mar. 24, 1931 | H. Bilgram, M.F. Hill | Machine for making rotors | gear making machines |
| 1,847,588 | Mar. 01, 1932 | C. Booth | Grinding Machine | grinding machines |
| 1,877,505 | Sep. 13, 1932 | B.A. Kearns, F.S. Haas | Grinding Machine | grinding machines |
| 1,891,661 | Dec. 20, 1932 | G.W. Binns | Grinding | grinding machines |
| 1,976,109 | Oct. 09, 1934 | W.D. Archea | Grinding Machine | grinding machines |
| 1,993,822 | Mar. 12, 1935 | F.S. Haas, R.E. Harrison, G.W. Binns, S.E. Bergstrum | Grinding Machine | grinding machines |
| 1,993,831 | Mar. 12, 1935 | A.H. Dall | Apparatus for Producing Surfaces of Revolution Eccentric to One Another | grinding machines |
| 1,997,551 | Apr. 09, 1935 | M. Romaine | Grinding Machine | grinding machines |
