| All Patents in class 279/89 |
Patents 16 -
27
of 27
      |
| Number | Date | Patentee | Title | Type |
| 1,413,101 | Apr. 18, 1922 | S.J. Cushing | Tool Holder | tool holders |
| 1,571,497 | Feb. 02, 1926 | G.W. Staley | Extension Bit | drill bit extensions |
| 1,809,553 | Jun. 09, 1931 | E.P. Graul, Administratrix, H.M. Graul, deceased (Estate of) | Tool Holder | tool holders |
| 1,958,941 | May 15, 1934 | K.J. Chapman | Tool Holder for Nibbling Machines | tool holders |
| 2,245,676 | Jun. 17, 1941 | E.M. Johnson | Tool attachment | tool and die maker |
| 2,684,249 | Jul. 20, 1954 | R.M. Woytych | Toolhead and Taper Shank Adapter | metalworking machine tool holders |
| 2,865,641 | Dec. 23, 1958 | W.P. McKain | Tool Holder for Tool Dressing Machines | tool holders |
| 2,931,659 | Apr. 05, 1960 | R.E. Novkov | Quick Change Tool Holder | milling machine tools |
| 3,498,624 | Mar. 03, 1970 | R.G. Koch, E.J. Hammond | Chuck device | drill press chucks |
| 3,533,638 | Oct. 13, 1970 | R.K. Sedgwick | Tool Locking Mechanism | metalworking machine mechanisms |
| 3,596,917 | Aug. 03, 1971 | H.F. Meyer | Tool adapter | |
| 3,622,170 | Nov. 23, 1971 | R.K. Sedgwick | Tool-Locking Mechanism | metalworking machine tool holders |
