| All Patents in class 451/173 |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 98,850 | Jan. 18, 1870 | H. Harpin, J. Coulter | Stone Dressing Machine | stone dressing machines |
| 382,909 | May 15, 1888 | H.H. Scoville | Polishing Lathe | stoneworking lathes |
| 422,874 | Mar. 04, 1890 | L.B. Benton | Tool Grinder | tool grinders |
| 763,315 | Jun. 21, 1904 | J.M. Nash | Machine for reducing wood or other material | |
| 956,918 | May 03, 1910 | T.B. Williams | Valve-reseating tool | automotive tools |
| 1,941,275 | Dec. 26, 1933 | G.A. Schipper | Sanding machine | sanding machines |
| 2,257,452 | Sep. 30, 1941 | A.H. Dall, G.W. Binns | Metal Finishing | grinding machines |
| 2,333,304 | Nov. 02, 1943 | C. Herfurth, A.H. Dall, H. Ernst | Surface Finishing Machinery | grinding machines |
| 2,778,170 | Jan. 22, 1957 | E.V. Flanders | Method of Grinding, Including Grinding Wheel Forming | grinder dressers |
| 3,120,723 | Feb. 11, 1964 | W.F. Jessup | Machine Tool Mechanism for the Formation of Circular Contours | grinder dressers |
