| All Patents in class 408/137 |
Patents 46 -
56
of 56
      |
| Number | Date | Patentee | Title | Type |
| 1,249,794 | Dec. 11, 1917 | S. McClellan | Ratchet chain breast-drill | breast drills |
| 1,473,995 | Nov. 13, 1923 | C.B. Long | Post drill | drilling and boring |
| 1,516,815 | Nov. 25, 1924 | A.F. Froussard | Boring Machine | portable metal drilling machines |
| 1,746,266 | Feb. 11, 1930 | D.C. Klausmeyer | Spindle Feeding Means | metalworking machine mechanisms |
| 1,859,547 | May 24, 1932 | W.H. Young | Plug cutting tool | plug cutters |
| 1,958,075 | May 08, 1934 | T. Thorsen, A. Storm | Means for adjusting the cutters of boring machines and the like | automotive tools |
| 2,035,283 | Mar. 24, 1936 | C.J. Schroeder | Machine tool | |
| 2,337,223 | Dec. 21, 1943 | J.B. Armitage | Machine Tool Transmission and Control Mechanism | milling machines |
| 3,058,129 | Oct. 16, 1962 | E.B. Sullivan | Combination Drilling and Self-Leading Tapping Machine Tool | |
| 3,145,401 | Aug. 25, 1964 | F.G. Burg | Lead screw operated tapping spindle with quick acting reversing means | drill presses |
| 3,222,956 | Dec. 14, 1965 | L.A. Attermeyer, L.A. Dever | Machine Tool Spindle Mechanism | vertical boring mills |
