| All Patents in class 451/548 |
Patents 16 -
30
of 36
      |
| Number | Date | Patentee | Title | Type |
| 639,035 | Dec. 12, 1899 | G. Hart | Chuck for emery-wheels | grinding wheels |
| 794,495 | Jul. 11, 1905 | G. Gorton | Abrading Surface | grinding machines |
| 794,496 | Jul. 11, 1905 | G. Gorton | Abrading Sheet | abrasive sheets |
| 883,649 | Mar. 31, 1908 | A.B. Landis | Grinding-machine | grinders |
| 1,079,304 | Nov. 18, 1913 | H.K. Spencer | Mounting Of Abrasive Wheels | grinder wheels |
| 1,094,361 | Apr. 21, 1914 | J.C. Blevney | Polishing device | |
| 1,133,475 | Mar. 30, 1915 | E.R. Hyde | Grinding Wheel | grinding wheels |
| 1,260,326 | Mar. 26, 1918 | E. Cavicchi | Rotary Grinding and Polishing Tool | polishing and buffing machinery |
| 1,415,331 | May 09, 1922 | E.B. Gardner | Grinding wheel | |
| 1,461,184 | Jul. 10, 1923 | F.E. Gardner | Abrasive-wheel chuck for grinding machine | |
| 1,531,282 | Mar. 31, 1925 | F.E. Gardner | Grinding machine | disk sanders |
| 1,589,855 | Jun. 22, 1926 | E.R. Hyde | Sectional Grinding Wheel | grinding wheels |
| 1,698,685 | Jan. 08, 1929 | H.K. Spencer | Abrasive Wheel | grinder wheels |
| 1,743,604 | Jan. 14, 1930 | F.O. Hoagland | Adapter for Segmental Abrasive Wheels | grinder wheels |
| 1,996,980 | Apr. 09, 1935 | H.F. Skillings | Rotary Abrading Tool | grinder wheels |
