| All Patents in class 451/276 |
Patents 1 -
10
of 22
      |
| Picture | Number | Date | Patentee | Title |
 | 173,234 | Feb. 08, 1876 | W.H. Ogilvie | Improvement in Machines for Grinding [Insertable] Saw-Teeth |
| | 541,349 | Jun. 18, 1895 | F.N. Gardner | Grinding and Polishing Machine |
 | 630,536 | Aug. 08, 1899 | J.N. Heald, L.S. Heald | Drill-grinding machine |
 | 641,107 | Jan. 09, 1900 | W.C. Heister | Machine for grinding drills |
 | 643,927 | Feb. 20, 1900 | O.S. Walker | Drill-grinder |
| | 736,843 | Aug. 18, 1903 | R.C. Greenerd | Tool Grinder |
| | 779,646 | Jan. 10, 1905 | G. Gorton | Grinding Machine |
| | 1,207,535 | Dec. 05, 1916 | F.E. Gardner | Disk grinder |
 | 1,268,967 | Jun. 11, 1918 | J.W. Hampton | Grinding Machine |
 | 1,337,353 | Apr. 20, 1920 | E.B. Gardner | Grinding-machine |
