| All Patents in class 451/237 |
Patents 31 -
45
of 72
      |
| Number | Date | Patentee | Title | Type |
| 612,240 | Oct. 11, 1898 | L.E. Harper, C.L. Grohmann | Machine for dressing and grinding metal | grinders |
| 624,882 | May 09, 1899 | F. Unkrich | Spoke-finishing machine | wheelwright |
| 626,451 | Jun. 06, 1899 | M.D. Pratt, C.A. Alden | Saw Grinding Machine | saw sharpening machines |
| 627,310 | Jun. 20, 1899 | C. De Los Rice | Gear Cutting Machine | gear making machines |
| 646,397 | Mar. 27, 1900 | W.H. Thorne, J.S. Bancroft | Grinding-Machine | tool grinders |
| 647,975 | Apr. 24, 1900 | E. Liebert, H.A. Liebert | Automatic Feeding and Regulating Device for Machine Tools | metal lathe accessories and attachments |
| 698,315 | Apr. 22, 1902 | E.S. Shimer, H.A. Pardoe | Grinding-machine | cutter grinding machines |
| 758,628 | May 03, 1904 | E. Earle | Engine-lathe | metal lathes |
| 809,552 | Jan. 09, 1906 | J. Buffelen | Machine for making columns | wood lathes |
| 860,367 | Jul. 16, 1907 | J. Gramelspacher | Sandpapering-machine | belt sanders |
| 880,965 | Mar. 03, 1908 | J.T. Brantley | Sandpaper-machine | belt sanders |
| 960,408 | Jun. 07, 1910 | J.L. Nolan, F.C. Rowell | Abrading-machine | sanding machines |
| 1,079,420 | Nov. 25, 1913 | S. MacKay | Method of Adjusting Rotary Cutters | sharpening machines |
| 1,182,362 | May 09, 1916 | W.F. Fischer | Grinding Machine | profile and contour grinders |
| 1,251,527 | Jan. 01, 1918 | S. Hough | Adustable & Improved Cutting Head for Boring Out Shells | lathe tools |
