| All Patents in class 451/269 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 494,715 | Apr. 04, 1893 | I. Grasset | Device for Polishing Precious Stones | polishing and buffing machinery |
| 610,036 | Aug. 30, 1898 | G.A. Ensign | Tread-sanding machine | specialty woodworking machines |
| 1,017,880 | Feb. 20, 1912 | A.B. Landis | Grinding-machine | grinders |
| 1,264,928 | May 07, 1918 | L.R. Heim | Device for Feeding Rolls for End Grinding | |
| 1,436,759 | Nov. 28, 1922 | E.B. Gardner | Ring-grinding machine | grinders |
| 1,486,337 | Mar. 11, 1924 | W.E. Hoke | Machine for Making Gauges and Other Articles | lapping machines |
| 1,499,104 | Jun. 24, 1924 | F.E. Gardner | Grinding machine | disk sanders |
| 1,523,952 | Jan. 20, 1925 | J. Nielsen, R.D. Gardner, E.B. Gardner | Grinding machine | disk sanders |
| 1,576,820 | Mar. 16, 1926 | F.E. Gardner | Grinding machine | disk sanders |
| 1,651,382 | Dec. 06, 1927 | R.D. Gardner, J. Nielsen, E.B. Gardner | Grinding machine | |
| 2,336,796 | Dec. 14, 1943 | L.J. Lalime, A.E. Mandeville | Grinding Machine | grinding machines |
