| All Patents in class 451/369 |
Patents 31 -
45
of 48
      |
| Number | Date | Patentee | Title | Type |
| 1,227,398 | May 22, 1917 | A.P. De Villa-Amil | Tool Holder | sharpening tool holders |
| 1,231,238 | Jun. 26, 1917 | R.L. Carter | Gage | sanding machines |
| 1,385,519 | Jul. 26, 1921 | L.F. Calhoun | Cutting Tool Holder | sharpening tool holders |
| 1,705,629 | Mar. 19, 1929 | W.H. Wildbore | V Block and Angle Plate | V blocks |
| 1,807,999 | Jun. 02, 1931 | E.P. McMurtry | Universally Adjustable Tool Holder | sharpening tool holders |
| 1,889,248 | Nov. 29, 1932 | A.J. Kilmer | Adjustible Tool Support | grinding fixtures |
| 2,371,831 | Mar. 20, 1945 | R.L. Leming | Layout and Drill V Block | V blocks |
| 2,385,902 | Oct. 02, 1945 | H.C. Wilson | Fixture for grinding thread-cutting tools | grinding fixtures |
| 2,397,109 | Mar. 26, 1946 | O.C. Hedin | Device for precision drawing | |
| 2,410,494 | Nov. 05, 1946 | V.W. Gideon | Tool Bit Fixture | grinding fixtures |
| 2,467,674 | Apr. 19, 1949 | E.C. Krueger | Tool grinder | |
| 2,595,093 | Apr. 29, 1952 | G.H. Mouw | Tool grinding fixture | sharpening tools and fixtures |
| 2,688,828 | Sep. 14, 1954 | R.J. Aulenbach | Angle Plate for Grinding Tool Bits | angle bars and angle plates |
| 2,718,104 | Sep. 20, 1955 | M.B. Kirklin | V Block | V blocks |
| 2,807,920 | Oct. 01, 1957 | R.E. Househo;der | Tool Holder | metalworking machine tool holders |
