| All Patents in class 451/209 |
Patents 1 -
15
of 15
      |
| Number | Date | Patentee | Title | Type |
| 79,610 | Jul. 07, 1868 | J.B. Tarr | Machine for Polishing Spherical Shot and Shells | polishing machines |
| 1,264,930 | May 07, 1918 | L.R. Heim | Roll Grinding Machine | |
| 1,483,748 | Feb. 12, 1924 | F.C. Sanford | Grinding Machine | centerless grinders |
| 1,611,135 | Dec. 14, 1926 | F.C. Sanford | Grinding Machine | centerless grinders |
| 1,683,974 | Sep. 11, 1928 | L.R. Heim | Grinding Apparatus | grinding machines |
| 1,692,834 | Nov. 27, 1928 | L.R. Heim | Art and Apparatus for Producing Ground Articles | grinding machines |
| 1,707,708 | Apr. 02, 1929 | J.E. Caster | Process for the Production of Spherical Articles | grinding machines |
| 1,722,386 | Jul. 30, 1929 | C.H. Norton | Centerless Grinding Machine | grinding machines |
| 1,722,387 | Jul. 30, 1929 | C.H. Norton | Centerless Grinding Machine | grinding machines |
| 1,733,087 | Oct. 22, 1929 | L.R. Heim | Grinding Apparatus | grinding machines |
| 1,794,975 | Mar. 03, 1931 | R. Mershon | Grinding Machine | grinding machines |
| 1,873,423 | Aug. 23, 1932 | F.M. Kern | Grinding Machine | grinding machines |
| 2,000,586 | May 07, 1935 | C. Booth, A.W. Foerster | Grinding Machine | grinding machines |
| 2,280,620 | Apr. 21, 1942 | F.J. Theler, G.W. Binns | Apparatus for Finishing Tubular Articles | grinding machines |
| 2,344,371 | Mar. 14, 1944 | R.M. Shaw, Jr. | Ring Grinding Machine | grinding machines |
