| All Patents in class 279/74 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 572,099 | Dec. 01, 1896 | G. Bettcher | Safety Socket for Taps or Drills | tap and die holders |
| 889,768 | Jun. 02, 1908 | A.L. De Leeuw | Locking Mechanism for Machine Tools | metalworking machine mechanisms |
| 1,252,253 | Jan. 01, 1918 | J.C. Dufresne | Chuck | |
| 1,391,177 | Sep. 20, 1921 | G.H. Du Sell | Chuck | |
| 1,679,175 | Jul. 31, 1928 | F. Schneider, E.L. Connell | Chuck | |
| 1,862,337 | Jun. 07, 1932 | G.W. Emrick | Tap, drill, and similar tool | drill press chucks |
| 1,862,352 | Jun. 07, 1932 | G.W. Emrick | Tool adapter | tapping heads and chucks |
| 1,862,370 | Jun. 07, 1932 | G.W. Emrick | Chuck device | tapping heads and chucks |
| 1,917,531 | Jul. 11, 1933 | J.F. Lincoln | Electric Arc Welding Apparatus | welding machines |
| 2,172,070 | Sep. 05, 1939 | C.A. Palmgren | Chuck | drill chucks |
| 2,701,724 | Feb. 08, 1955 | G.T. Harris | Collet chuck | metal lathe chucks |
| 3,369,820 | Feb. 20, 1968 | R.E. Reed, R.A. Lehmkuhl | Power Chuck | milling machine accessories |
| 4,786,221 | Nov. 22, 1988 | K.L. March | Quick release chuck mechanism and method for achieving interchange ability of tool inserts therein | tapping machines |
