| All Patents in class 279/52 |
Patents 1 -
10
of 17
      |
| Picture | Number | Date | Patentee | Title |
 | 50,214 | Oct. 03, 1865 | C.H. Amidon | Bit stock |
 | 212,110 | Feb. 11, 1879 | D. Powers, O. Peck | Improvement in bit-stocks |
 | 890,894 | Jun. 16, 1908 | G.W. Leonard, W.H. Ehrhart | Bit-Extender |
 | 904,501 | Nov. 24, 1908 | J.P. Bartholomew | Bit-Brace |
 | 1,784,380 | Dec. 09, 1930 | W.B. Murdoch | Bit or Drill Holder |
 | 1,850,297 | Mar. 22, 1932 | F.A. Volz | Bit or Drill Holder |
| | 1,886,224 | Nov. 01, 1932 | J.M. Redinger | Cone Chuck |
| | 2,071,954 | Feb. 23, 1937 | L. Scruggs | Chuck or Tool Holder |
| | 2,153,847 | Apr. 11, 1939 | L. Scruggs | Chuck or Tool Holder |
 | 2,193,917 | Mar. 19, 1940 | A.P. Albrecht, A.R. Bone | Bit Extension |
