| All Patents in class 408/67 |
Patents 1 -
10
of 34
      |
| Picture | Number | Date | Patentee | Title |
 | 13,606 | Sep. 25, 1855 | E.R. Morrison, A. Wyckoff | Boring-machine |
 | 31,883 | Apr. 02, 1861 | S.P. Gilbert | Hollow Auger |
 | RE3,133 | Sep. 22, 1868 | L. Stevens | Improvement in Boring Machines |
 | 111,167 | Jan. 24, 1871 | O.O. Witherell, A. Bauman | Improvement in hollow augers |
 | 117,567 | Aug. 01, 1871 | W.P. Powers | Pump auger |
| | 143,412 | Oct. 07, 1873 | N.C. Hubbell | Machines for Making Metal Screws |
| | 166,490 | Aug. 10, 1875 | S.L. Worsley | Machine for Tapping Nuts |
| | 197,070 | Nov. 13, 1877 | S.L. Worsley | Metal-Screw Threading Machine |
 | 438,605 | Oct. 21, 1890 | F.S. Cook | Nut Tapping Machine |
| | 465,838 | Dec. 29, 1891 | L.B. Curtis | Pipe Threading Attachment for Lathes |
