| All Patents in class 125/11.21 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 77,303 | Apr. 28, 1868 | R.B. Matthews | Machine for Facing Grindstones | grinder dressers |
| 561,367 | Jun. 02, 1896 | G.L. Badger | Method and Apparatus for Dressing Stone | stone dressing machines |
| 1,091,851 | Mar. 31, 1914 | A.B. Landis | Automatic balancing mechanism | balancing machinery |
| 1,155,532 | Oct. 05, 1915 | F.A. Ward | Trimming mechanism for grinder-wheels of shaft-grinding machines | cylindrical grinders |
| 1,483,748 | Feb. 12, 1924 | F.C. Sanford | Grinding Machine | centerless grinders |
| 1,631,596 | Jun. 07, 1927 | H.E. Kempton | Wheel Dressing Mechanism | grinder dressers |
| 1,753,682 | Apr. 08, 1930 | G.W. Binns | Truing Mechanism | grinding machines |
| 1,871,504 | Aug. 16, 1932 | L.F. Nenninger, S. Einstein | Truing Device for the Wheels of Grinding Machines | grinding machines |
| 1,954,771 | Apr. 10, 1934 | E. Sobolewski | Truing Apparatus | grinding machines |
| 2,010,359 | Aug. 06, 1935 | F.S. Haas | Grinding Machine | grinding machines |
| 2,415,121 | Feb. 04, 1947 | H.V. Boehnke, C.A. Wiken | Drill grinder | cutter grinding |
