| All Patents in class 408/233 |
Patents 16 -
30
of 41
      |
| Number | Date | Patentee | Title | Type |
| 285,440 | Sep. 25, 1883 | J. Swan | Auger | drill bits |
| 293,397 | Feb. 12, 1884 | G.W. Baker | Boring Tool | lathe tools |
| 329,660 | Nov. 03, 1885 | H.S. Lord | Auger-Bit | auger bits |
| 352,829 | Nov. 16, 1886 | E.L. Mansfield | Reaming Tool | reamers |
| 387,448 | Aug. 07, 1888 | H.W. Richards | Auger | auger bits |
| 450,879 | Apr. 21, 1891 | B.B. Allen | Reamer | reamers |
| 458,640 | Sep. 01, 1891 | E.C. Phillips | Bit With Replaceable Wood-Screw Lead | drill bits |
| 467,067 | Jan. 12, 1892 | W. Vanderman | Combination Die Stock and Reamer | tap and die holders |
| 503,224 | Aug. 15, 1893 | A.L. Adams | Circular Rim Cutting Edge Bit | drill bits |
| 575,148 | Jan. 12, 1897 | J.L. Chapman | Chaser Die | thread chasers |
| 721,056 | Feb. 17, 1903 | F.H. Löser | Boring or Cutting Tool Holder | drilling and boring tool holders |
| 808,245 | Dec. 26, 1905 | J. Lund | Wood-Boring Implement | auger bits |
| 1,034,724 | Aug. 06, 1912 | H. Mueller | Tool-shank | boring bars |
| 1,047,466 | Dec. 17, 1912 | F.A. Wagner | Cutter Securing Means | metalworking countersinks |
| 1,140,988 | May 25, 1915 | B. Kunitz | Drill | drill bits |
