| All Patents in class 451/226 |
Patents 16 -
26
of 26
      |
| Number | Date | Patentee | Title | Type |
| 1,050,781 | Jan. 21, 1913 | J.N. Anderson | Tool Holder | sharpening tool holders |
| 1,262,540 | Apr. 09, 1918 | J. Miller | Grinding Machine | grinding machines |
| 1,273,892 | Jul. 30, 1918 | T. Lund | Grinding Machine | |
| 1,717,899 | Jun. 18, 1929 | G.D. Sundstrand | Grinding Machine | internal grinders |
| 2,119,741 | Jun. 07, 1938 | W.H. Fischer | Drill Grinding Tool | drill grinders |
| 2,335,497 | Nov. 30, 1943 | F. Ehrsam | Woodsman's Pal 280 | |
| 2,415,121 | Feb. 04, 1947 | H.V. Boehnke, C.A. Wiken | Drill grinder | cutter grinding |
| 2,422,531 | Jun. 17, 1947 | W.B. Heinz, G.L. Dannehower | Apparatus for cutting bars, tubes, and the like | |
| 2,535,895 | Dec. 26, 1950 | W. Trible, G.A. Lensky, J.Q. Buckles | Automatic Profile Cutting Machine | milling machines |
| 3,102,370 | Sep. 03, 1963 | T.A. Ribich | Apparatus for producing a drill point | making drills and augers |
| 3,335,527 | Aug. 15, 1967 | D.H. Sabine | Sharpening apparatus for cutting tools | sharpening machines |
