| All Patents in class 451/334 |
Patents 1 -
10
of 17
      |
| Picture | Number | Date | Patentee | Title |
| | 344,777 | Jun. 29, 1886 | G.M. Griswold | Automatic Metal Grinding Machine |
 | 763,315 | Jun. 21, 1904 | J.M. Nash | Machine for reducing wood or other material |
| | 1,814,361 | Jul. 14, 1931 | C. Booth | Grinding Machinery |
| | 1,814,362 | Jul. 14, 1931 | C. Booth | Centerless Grinding Machinery |
| | 1,843,079 | Jan. 26, 1932 | C. Booth | Grinding Machinery |
| | 1,904,642 | Apr. 18, 1933 | C.G. Hunt | Grinding Machine |
| | 1,976,109 | Oct. 09, 1934 | W.D. Archea | Grinding Machine |
| | 1,991,958 | Feb. 19, 1935 | M. Romaine | Grinding Machine |
| | 2,002,938 | May 28, 1935 | L.A. Dumser, O.W. Floody | Machine tool |
| | 2,111,784 | Mar. 22, 1938 | A.M. Johnson | Honing machine |
