| All Patents in class 451/369 |
Patents 16 -
30
of 48
      |
| Number | Date | Patentee | Title | Type |
| 646,397 | Mar. 27, 1900 | W.H. Thorne, J.S. Bancroft | Grinding-Machine | tool grinders |
| 658,426 | Sep. 25, 1900 | J.H. Burck | Tool-grinding machine | sharpening machines |
| 664,512 | Dec. 25, 1900 | J.B. Wallace | Chaser Grinding Machine | sharpening machines |
| 678,712 | Jul. 16, 1901 | F.F. Woods, C.W. Blood | Gage for setting cutter-head blades | cutterhead machine accessories |
| 903,048 | Nov. 03, 1908 | L. Boley | Tool Holder | grinding fixtures |
| 904,817 | Nov. 24, 1908 | F. Stutzman | Universal grinding-machine | bench or pedestal grinders |
| 906,263 | Dec. 08, 1908 | M.W. Murray | Tool Holder | sharpening tool holders |
| 958,945 | May 24, 1910 | J.L. Stoffer | Tool Holder | sharpening tool holders |
| 977,060 | Nov. 29, 1910 | F. Welker | Grinding-machine | cutter grinding |
| 981,810 | Jan. 17, 1911 | D.I. Sterling | Grindstone Attachment | grinding attachments |
| 993,335 | May 30, 1911 | A. Bergstrom | Tool Holder | sharpening tool holders |
| 1,048,173 | Dec. 24, 1912 | D. Kaaumoana | Adjustable Tool Holder | sharpening tool holders |
| 1,050,781 | Jan. 21, 1913 | J.N. Anderson | Tool Holder | sharpening tool holders |
| 1,184,340 | May 23, 1916 | F.A. Gettings | Tool Holder | sharpening tool holders |
| 1,200,416 | Oct. 03, 1916 | J.P. Draper | Tool Holder | lathe tool holders and tool posts |
