| All Patents in class 451/374 |
Patents 31 -
45
of 74
      |
| Number | Date | Patentee | Title | Type |
| 1,052,649 | Feb. 11, 1913 | J.W. Boynton | Grinding Machine | sharpening machines |
| 1,075,285 | Oct. 07, 1913 | A.L. De Leeuw | Cutter Setting Dial | tool grinders |
| 1,078,540 | Nov. 11, 1913 | A.L. De Leeuw | Gear Cutter Grinder | grinding fixtures |
| 1,132,551 | Mar. 23, 1915 | C. Bouillon | Mechanism for relieving the teeth of cutters | metal lathe accessories and attachments |
| 1,143,691 | Jun. 22, 1915 | A.L. De Leeuw | Grinder Structure | tool grinders |
| 1,255,962 | Feb. 12, 1918 | E.D. Paul, C.C. Warner | Grinding Machine | |
| 1,284,721 | Nov. 12, 1918 | J. Lefevre | Work Holder for Cutter Grinding Machines | |
| 1,299,208 | Apr. 01, 1919 | F. Müller | Relieving Lathe | metal relieving machines |
| 1,472,827 | Nov. 06, 1923 | A.W. Erdman | Cutter Grinding Attachment | grinding attachments |
| 1,662,078 | Mar. 13, 1928 | O. Severson | Method of and Machine for Grinding Fine-Tooth Hobs | hob grinding machines |
| 1,662,079 | Mar. 13, 1928 | O. Severson | Machine for Grinding Hob and Disk Cutters | hob grinding machines |
| 1,674,350 | Jun. 19, 1928 | R.R. Weddell | Universal Grinding Fixture | hob grinding machines |
| 1,679,413 | Aug. 07, 1928 | H.R. Isler, L.F. Nenninger, S. Einstein | Cutter Grinder | tool grinders |
| 1,835,476 | Dec. 08, 1931 | J.C. Drader | Grinding Fixture | grinding fixtures |
| 1,835,687 | Dec. 08, 1931 | H.M. Allison | Backing-Off Mechanism for Grinding Machines | grinding attachments |
