| All Patents in class 408/140 |
Patents 16 -
30
of 33
      |
| Number | Date | Patentee | Title | Type |
| 1,506,331 | Aug. 26, 1924 | I. Benkö | Tool Holder | drilling and boring tool holders |
| 1,559,944 | Nov. 03, 1925 | G.W. Emrick | Clutch construction for tapping attachments and the like | tapping heads and chucks |
| 1,699,870 | Jan. 22, 1929 | A.G. Decker, S.D. Black | Portable tool | handheld power tools |
| 1,974,345 | Sep. 18, 1934 | A.J. Scholtes | Double Action Releasing Tool Holder | tapping heads and chucks |
| 1,976,944 | Oct. 16, 1934 | D.C. Klausmeyer | Feed gear antioverload device | radial drill presses |
| 2,228,622 | Jan. 14, 1941 | G.W. Emrick | Clutch mechanism | tapping heads and chucks |
| 2,231,465 | Feb. 11, 1941 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
| 2,253,491 | Aug. 26, 1941 | H.F. Bakewell | Threading tool | taps and dies |
| 2,257,364 | Sep. 30, 1941 | H.F. Bakewell | Machine tool | tapping machines |
| 2,262,512 | Nov. 11, 1941 | H.E. Musselman | Drill press | drill presses |
| 2,287,391 | Jun. 23, 1942 | H.E. Musselman | Drill press | drill presses |
| 2,379,992 | Jul. 10, 1945 | A.M. Sasgen | Work supporting and finishing apparatus | tool making |
| 2,418,220 | Apr. 01, 1947 | I.F. Churchill | Control mechanism for drilling machines | drill presses |
| 2,709,267 | May 31, 1955 | J.R. Bashor, A.P. Speckin | Precision tapping spindle | tapping heads and chucks |
| 2,767,598 | Oct. 23, 1956 | F.G. Burg | Speed control system for machine tools | drill presses |
