| All Patents in class 408/173 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 81,500 | Aug. 25, 1868 | B. Haviland | Improvement in chucks | metal lathe chucks |
| 133,574 | Dec. 03, 1872 | G. Emig | Machines for Cutting Screw Threads on Bolts and Nuts | metal threading machines |
| 155,588 | Oct. 06, 1874 | C.H. Morgan | Holders for Screw Threading Dies | tap and die holders |
| 210,106 | Nov. 19, 1878 | P. Everitt | Screw-Stocks | tap wrenches and die stocks |
| 227,508 | May 11, 1880 | P. Everitt | Screw-Stock | tap wrenches and die stocks |
| 411,002 | Sep. 17, 1889 | J.A. Becher | Bolt Threading Machine | metal threading machines |
| 740,016 | Sep. 29, 1903 | L.A. Howe | Self-opening die | |
| 767,036 | Aug. 09, 1904 | H.W. Borchers | Tool Holder | boring heads |
| 1,018,393 | Feb. 20, 1912 | A.B. Landis | Cutter-head | metal threading machines |
| 1,464,177 | Aug. 07, 1923 | W.H. Gates | Die Head | tap and die holders |
| 2,092,755 | Sep. 14, 1937 | J.P. Francesco | Boring tool | mortising machines |
| 2,751,614 | Jun. 26, 1956 | E.J. Bourguignon | Tool Holder Provided With Readily Adjustable Alignment Means | tapping heads and chucks |
| 4,162,867 | Jul. 31, 1979 | D.W. Barton, R.A. Rhinefrank, D.J. Calcaterra | Dual Cutter Boring Head | boring heads |
