| All Patents in class 451/369 |
Patents 1 -
15
of 50
      |
| Number | Date | Patentee | Title | Type |
| 29,512 | Aug. 07, 1860 | E.W. Nichols | Holder for Polishing-Wheels | bench or pedestal grinders |
| 58,504 | Oct. 02, 1866 | w.H. Strahan | Improved Tool-Rest for Grindstones | grinding attachments |
| 79,246 | Jun. 23, 1868 | M.V. Collins, M.M. Morse | Edge Tool Grinder | tool grinders |
| 96,066 | Oct. 19, 1869 | E.A. White | Grinding Metal Plates | surface grinders |
| 147,297 | Feb. 10, 1874 | F. White | Improvement in sharpening-machines | sharpening machines |
| 147,894 | Feb. 24, 1874 | N.P. Bradish | Tool-Holders | grinding attachments |
| 158,172 | Dec. 29, 1874 | C.H. Hill, A.W. Proctor | Improvement in machine for grinding knives | cutter grinding |
| 201,449 | Mar. 19, 1878 | A.K. Rider | Drill Grinder | drill grinders |
| 243,770 | Jul. 05, 1881 | J.E. Woodbridge, F.N. Gardner | Holder for Grinding Tools | grinding attachments |
| 348,497 | Aug. 31, 1886 | G.A. Long | Tool-holder for grinding | woodworking machine sharpening mechanisms |
| 417,001 | Dec. 10, 1889 | A.E. Creigh | Automatic knife-grinder | sharpening machines |
| 425,781 | Apr. 15, 1890 | W.D. Graves, Jr. | Knife-grinding machine | sharpening machines |
| 460,497 | Sep. 29, 1891 | J.S. Bancroft | Tool Grinding Machine | tool grinders |
| 504,000 | Aug. 29, 1893 | M.M. Aust, C.P. Thiel | Machine for Grinding Thread Cutting Tools | tool grinders |
| 507,634 | Oct. 31, 1893 | S.C. Rogers | Knife-grinder | sharpening machines |
