| All Patents in class 451/269 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
 | 494,715 | Apr. 04, 1893 | I. Grasset | Device for Polishing Precious Stones |
 | 610,036 | Aug. 30, 1898 | G.A. Ensign | Tread-sanding machine |
 | 1,017,880 | Feb. 20, 1912 | A.B. Landis | Grinding-machine |
| | 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 |
| | 1,486,337 | Mar. 11, 1924 | W.E. Hoke | Machine for Making Gauges and Other Articles |
| | 1,499,104 | Jun. 24, 1924 | F.E. Gardner | Grinding machine |
| | 1,523,952 | Jan. 20, 1925 | J. Nielsen, R.D. Gardner, E.B. Gardner | Grinding machine |
| | 1,576,820 | Mar. 16, 1926 | F.E. Gardner | Grinding machine |
| | 1,651,382 | Dec. 06, 1927 | R.D. Gardner, J. Nielsen, E.B. Gardner | Grinding machine |
