| All Patents in class 451/213 |
Patents 16 -
30
of 91
      |
| Number | Date | Patentee | Title | Type |
| 376,814 | Jan. 24, 1888 | J.A. Coleman | Grindng Machine | cylindrical grinders |
| 405,706 | Jun. 25, 1889 | E.R. Hyde | Surface Grinding or Planing Machine | surface grinders |
| 418,977 | Jan. 07, 1890 | C.E. Forry | Machine for Grinding Lawn Mower Knives | sharpening machines |
| 421,487 | Feb. 18, 1890 | W.J. Fisher | Saw grinding machine | tool making machines |
| 424,025 | Mar. 25, 1890 | A.H. Richardson | Machine for sharpening cutting-tools | sharpening machines |
| 439,154 | Oct. 28, 1890 | F. Holz | Cutter Grinder | milling machines |
| 441,997 | Dec. 02, 1890 | G.E. Whitehead | Grinding Machine | grinding machines |
| 483,288 | Sep. 27, 1892 | A.B. Landis | Grinding-machine | grinders |
| 612,240 | Oct. 11, 1898 | L.E. Harper, C.L. Grohmann | Machine for dressing and grinding metal | grinders |
| 643,914 | Feb. 20, 1900 | E.F. Shaw | Trowel Grinding Machine | grinding machines |
| 656,664 | Aug. 28, 1900 | E.B. Roth | Grinding Machine | internal grinders |
| 688,511 | Dec. 10, 1901 | A.M. Hall, C.C. Stuart | Sandpapering-machine | sanding machines |
| 717,605 | Jan. 06, 1903 | W. Oesterlein | Cutter and tool grinder | tool grinders |
| 734,799 | Jul. 28, 1903 | J.S. Bancroft | Tool Grinding Machine | tool grinders |
| 774,134 | Nov. 01, 1904 | S.L. Derby | Tool Holder for Grindstones | tool holders |
