| All Patents in class 279/90 |
Patents 16 -
22
of 22
      |
| Number | Date | Patentee | Title | Type |
| 1,651,777 | Dec. 06, 1927 | W.A. Peck | Extension-Bit Holder | drill bit extensions |
| 1,661,935 | Mar. 06, 1928 | T.J. Fegley, G.O. Leopold | Chuck for extension bits | |
| 1,758,069 | May 13, 1930 | J.H. Abramson | Bit Extension | drill bit extensions |
| 1,805,330 | May 12, 1931 | G.O. Leopold, T.J. Fegley | Extension bit | |
| 1,818,823 | Aug. 11, 1931 | A.L. Stowell | Brace Bit Extension | drill bit extensions |
| 1,862,337 | Jun. 07, 1932 | G.W. Emrick | Tap, drill, and similar tool | drill press chucks |
| 3,586,343 | Jun. 22, 1971 | R.E. Reed | Tool Orienting Arrangement | metalworking machine mechanisms |
