| All Patents in class 451/374 |
Patents 61 -
74
of 74
      |
| Number | Date | Patentee | Title | Type |
| 2,549,147 | Apr. 17, 1951 | B.G. Walters | Portable knife grinder for woodworking machines | sharpening machines |
| 2,560,967 | Jul. 17, 1951 | F. Lohutko | Apparatus for Grinding Gears and Gear Cutters | grinding attachments |
| 2,578,884 | Dec. 18, 1951 | L.C. Hammond | Work holder for grinding router bits | |
| 2,617,237 | Nov. 11, 1952 | E.P. Sacrey | Cutter head sharpening attachment | handheld routers |
| 2,725,690 | Dec. 06, 1955 | W.F. French | Cutter grinding mandrel with tooth rest | |
| 2,752,740 | Jul. 03, 1956 | G.H. Mouw | Form relieving fixture | sharpening tools and fixtures |
| 2,764,855 | Oct. 02, 1956 | O.W. Dawson | Fixture for positioning tool relative to grinding head | cutter grinding machines |
| 2,785,591 | Mar. 19, 1957 | V.H. Hildebrant | Saw grinding machine | woodworking machine sharpening mechanisms |
| 2,840,958 | Jul. 01, 1958 | C.E. Waller | Automatic Cutter Grinder | tool grinders |
| 3,030,744 | Apr. 24, 1962 | A.E. Mueller | Air film bearing for machine tools | grinders |
| 3,073,076 | Jan. 15, 1963 | W.F. French | Radius cutter grinding machine | |
| 3,190,046 | Jun. 22, 1965 | A.J. Bryant | Device for Holding a Rotary Cutting Tool | sharpening tool holders |
| 3,349,521 | Oct. 31, 1967 | A.J. Bryant | Device for Holding Rotary Cutting Tools | tap and die holders |
| 3,713,254 | Jan. 30, 1973 | L.H. Cheever, T.V. Williams | Controlled Tool for Machining Compound Surfaces | cutter grinding machines |
