| All Patents in class 451/48 |
Patents 1 -
15
of 21
      |
| Number | Date | Patentee | Title | Type |
| 10,017 | Sep. 13, 1853 | J.M. Smith | Improved cutter-head for molding machines | cutters |
| 209,782 | Nov. 12, 1878 | J. Swan | Improvement in the Manufacture of Auger-Bits | making drills and augers |
| 220,911 | Oct. 28, 1879 | L.D. Cogswell | Grinder | metal lathe accessories and attachments |
| 492,095 | Feb. 21, 1893 | P. Medart | Machine for grinding pulley-shafts and their couplings | grinders |
| 1,079,420 | Nov. 25, 1913 | S. MacKay | Method of Adjusting Rotary Cutters | sharpening machines |
| 1,271,495 | Jul. 02, 1918 | F.A. Ward | Method for Grinding Spline Shafts and Other Interrupted Cycindrical Bodies | grinder dressers |
| 1,536,736 | May 05, 1925 | A.W. Erdman, P.F. Vokal | Process of Making Milling Cutters | milling machine cutters |
| 1,662,078 | Mar. 13, 1928 | O. Severson | Method of and Machine for Grinding Fine-Tooth Hobs | hob grinding machines |
| 2,142,285 | Jan. 03, 1939 | H. Pelphrey | Hob and Method of Manufacture | gear cutting tools |
| 2,269,556 | Jan. 13, 1942 | J.A. St. Clair | Method for grinding saws | making sawblades |
| 2,332,421 | Oct. 19, 1943 | E. Wildhaber | Method And Machine For Relieving Cutters | metal relieving machines |
| 2,524,043 | Oct. 03, 1950 | J. Daugherty | Means of Controlling Temperature of Machinery | metal planers |
| 2,585,990 | Feb. 19, 1952 | W.G. Baldenhofer | Method of grinding intricate contours | profile and contour grinders |
| 2,778,170 | Jan. 22, 1957 | E.V. Flanders | Method of Grinding, Including Grinding Wheel Forming | grinder dressers |
| 2,805,522 | Sep. 10, 1957 | T.S. Dayton | Apparatus for Sharpening Wood Bits | drill sharpening machines |
