| All Patents in class 408/213 |
Patents 31 -
45
of 81
      |
| Number | Date | Patentee | Title | Type |
| 270,977 | Jan. 23, 1883 | I.T. Payne | Auger | auger bits |
| 278,539 | May 29, 1883 | H. Rugg, H. Halligan | Auger | auger bits |
| 283,040 | Aug. 14, 1883 | J. Swan | Auger-Bit | auger bits |
| 283,705 | Aug. 21, 1883 | H.E. Fuller | Boring-Bit | auger bits |
| 290,812 | Dec. 25, 1883 | J. Swan | Auger-Bit | auger bits |
| 306,907 | Oct. 21, 1884 | W.M. Dimitt | Auger Bit | drill bits |
| 309,868 | Dec. 30, 1884 | H. Olson | Auger | auger bits |
| 313,735 | Mar. 10, 1885 | G.H. Hill | Expansible bit | adjustable drill bits |
| 320,097 | Jun. 16, 1885 | J. Swan | Auger | auger bits |
| 323,454 | Aug. 04, 1885 | F. Shailer | Auger-Bit | auger bits |
| 329,660 | Nov. 03, 1885 | H.S. Lord | Auger-Bit | auger bits |
| 360,990 | Apr. 12, 1887 | C.E. Billings | Expansive bit | adjustable drill bits |
| 361,522 | Apr. 19, 1887 | C.H. Irwin | Auger Bit | drill bits |
| 374,432 | Dec. 06, 1887 | C.A. Simmons | Boring-Tool | auger bits |
| 387,448 | Aug. 07, 1888 | H.W. Richards | Auger | auger bits |
