| All Patents in class 279/6 |
Patents 46 -
60
of 102
      |
| Number | Date | Patentee | Title | Type |
| 1,361,198 | Dec. 07, 1920 | C.A. Strand | Tool Holder | lathe tool holders and tool posts |
| 1,361,686 | Dec. 07, 1920 | M.C. Conwell | Tool | boring heads |
| 1,395,859 | Nov. 01, 1921 | H.V. Morin | Tool Holder | boring heads |
| 1,428,754 | Sep. 12, 1922 | J. Carr | Tool chuck | lathe tool holders and tool posts |
| 1,439,190 | Dec. 19, 1922 | H.P. Pritchard | Boring or Surfacing Tool Holder | milling machine tools |
| 1,463,686 | Jul. 31, 1923 | J.N. Kaiser, J.H. Frey | Boring Head | boring heads |
| 1,506,034 | Aug. 26, 1924 | L. Swanson | Boring Tool Holder | drilling and boring tool holders |
| 1,718,089 | Jun. 18, 1929 | E.J. Tesoroni | Offset Boring Head | boring heads |
| 1,825,046 | Sep. 29, 1931 | B.T. Browand | Tool Holder | drill press chucks |
| 1,825,060 | Sep. 29, 1931 | G.E. Hallenbeck | Revolving Holder Machine Tool | drilling and boring tool holders |
| 1,935,493 | Nov. 14, 1933 | L.A. Wellington | Tool Holder | drilling and boring tool holders |
| 1,960,124 | May 22, 1934 | R.V. Russell | Boring Tool Holder or Boring Bar | boring heads |
| 1,962,951 | Jun. 12, 1934 | M.C. Conwell | Tool Head | boring heads |
| 1,980,336 | Nov. 13, 1934 | F.O. Hoagland | Chuck Retaining Means | metal lathe chucks |
| 2,093,743 | Sep. 21, 1937 | E.C. Steiner | Boring Head | boring heads |
