| All Patents in class 451/189 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 70,788 | Nov. 12, 1867 | T. Birch, A. Sowden | Improvement in grinding machine for circular saws | making sawblades |
| 398,243 | Feb. 19, 1889 | H. Ferguson | Machine for finishing poles or rods | sanding machines |
| 432,144 | Jul. 15, 1890 | W.J. Muncaster | Machine for Polishing Shafting | polishing machines |
| 505,221 | Sep. 19, 1893 | T. Harper | Machine for Buffing Metal Tubes | polishing machines |
| 1,264,129 | Apr. 23, 1918 | M.O. Reeves | Grinding Machine | |
| 1,419,073 | Jun. 06, 1922 | C.H. Norton | Machine for forming rolls | cylindrical grinders |
| 1,524,969 | Feb. 03, 1925 | L.F. Nenninger, S. Einstein | Centerless Grinding Machine | centerless grinders |
| 1,639,958 | Aug. 23, 1927 | C.H. Norton | Centerless Grinding Machine | grinding machines |
| 1,733,086 | Oct. 22, 1929 | E. Sobolewski | Centerless Grinder | centerless grinders |
| 1,733,087 | Oct. 22, 1929 | L.R. Heim | Grinding Apparatus | grinding machines |
| 1,733,094 | Oct. 22, 1929 | H. Isler | Centerless Grinder | centerless grinders |
| 1,803,165 | Apr. 28, 1931 | C. Booth | Centerless Grinder | grinding machines |
| 1,948,113 | Feb. 20, 1934 | H. Isler | Centerless Work Feed | centerless grinders |
| 2,002,489 | May 28, 1935 | C. Booth, A. Strom | Grinding Machine | grinding machines |
| 2,059,724 | Nov. 03, 1936 | G.A. Carlson | Finishing machine | polishing and buffing machinery |
