| All Patents in class 408/223 |
Patents 16 -
30
of 39
      |
| Number | Date | Patentee | Title | Type |
| 252,704 | Jan. 24, 1882 | W.H. Southwick | Combined Drill and Countersink | drill bits |
| 279,360 | Jun. 12, 1883 | J.W. Douglas | Combined Drill or Reamer, Tap and Socket | taps and dies |
| 332,308 | Dec. 15, 1885 | G.R. Valentine | Countersink | metalworking countersinks |
| 390,080 | Sep. 25, 1888 | S. Hipkins, Jr. | Reaming Tool | reamers |
| 413,972 | Oct. 29, 1889 | H.L. Shaler | Auger | auger bits |
| 503,224 | Aug. 15, 1893 | A.L. Adams | Circular Rim Cutting Edge Bit | drill bits |
| 505,844 | Oct. 03, 1893 | A.Y. Pearl | Auger | auger bits |
| 631,572 | Aug. 22, 1899 | L. Judson | Countersink Attachment | countersinks |
| 679,406 | Jul. 30, 1901 | A.W. Watson | Drill | drill bits |
| 695,559 | Mar. 18, 1902 | W. Jackmond | Reamer | tapered reamers |
| 716,441 | Dec. 23, 1902 | G.W. Latham | Tapered Twist Drill | twist drill bits |
| 736,575 | Aug. 18, 1903 | J. MacGregor, J.J. Blandford | Woodworking-Tool | washer cutters |
| 790,590 | May 23, 1905 | J.R. Gordon, W.R. Reynolds | Tool-Handle | screwdriver handles |
| 867,639 | Oct. 08, 1907 | G.J. Bragg | Twist Drill | metalworking twist drills |
| 877,592 | Jan. 28, 1908 | P.J. Creedon, W.G. Parry | Head for Boring-Bits | hollow bits |
