| All Patents in class 470/75 |
Patents 16 -
30
of 41
      |
| Number | Date | Patentee | Title | Type |
| 265,639 | Oct. 10, 1882 | A. Saunders | Chuck | pipe threading machines |
| 270,916 | Jan. 23, 1883 | W. Baker, J.F. Thomas | Device for Truing Axles | portable turning tools |
| 293,868 | Feb. 19, 1884 | W. Hargrave | Screw Cutting Implement | tap and die holders |
| 309,374 | Dec. 16, 1884 | M.C. Bignall, G.W. Whitman | Pipe cutting and threading machine | pipe cutting machines |
| 336,024 | Feb. 09, 1886 | G.D. Tucker | Screw Threading Tool | taps and dies |
| 406,857 | Jul. 09, 1889 | A. Saunders | Screw Cutting Die | pipe threading machines |
| 413,870 | Oct. 29, 1889 | J.N. Severance | Lathe Attachment for Making Metal Screws | button making machinery |
| 417,659 | Dec. 17, 1889 | J.S. Bancroft | Means for Operating the Die Heads of Bolt Threading Machines | metal threading machines |
| 443,500 | Dec. 30, 1890 | L.B. Curtis, R.P. Curtis | Pipe Threading Machine | pipe threading machines |
| 443,775 | Dec. 30, 1890 | C.L. Libby | Attachment for Turret Lathes | metal lathe accessories and attachments |
| 529,169 | Nov. 13, 1894 | J. Hartness | Screw Cutting Die | tap and die holders |
| 564,700 | Jul. 28, 1896 | H. Kupsch | Open Die Head | tap and die holders |
| 565,746 | Aug. 11, 1896 | J. Hartness | Screw Cutting Die | taps and dies |
| 569,902 | Oct. 20, 1896 | F.E. Wells, W.C. Wells | Machine for Making Nipples | pipe making machines |
| 572,934 | Dec. 08, 1896 | W.J. Smith | Die Head for Screw Cutting | tap and die holders |
