| All Patents in class 408/168 |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 79,198 | Jun. 23, 1868 | J. Brewer | Expanding Tap | |
| 79,276 | Jun. 23, 1868 | E. Sullivan | Reamer | reamers |
| 157,034 | Nov. 17, 1874 | W.D. Squires | Machines for Enlarging the Bore of Gun-Barrels | horizontal boring mills |
| 198,945 | Jan. 08, 1878 | J.M. Johnson | Improvement in collapsible screw-taps | taps and dies |
| 342,218 | May 18, 1886 | W. Miller | Expanding Reamer | reamers |
| 415,846 | Nov. 26, 1889 | F.H. Richards | Screw Tapping Machine | nut or bolt making machines |
| 484,813 | Oct. 25, 1892 | R.C. Nugent | Inside Calipers | calipers |
| 763,816 | Jun. 28, 1904 | W. Vosper | Die for cutting taper threads | plumber |
| 939,735 | Nov. 09, 1909 | W. Murchey | Thread-cutting tool | tapping heads and chucks |
| 1,024,656 | Apr. 30, 1912 | I.W. Sprink | Boring Bar | |
