| All Patents in class 408/86 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 25,289 | Aug. 30, 1859 | G.H. Burger, G. Taylor | Auger for Cutting Round Tenons | hollow bits |
| 76,103 | Mar. 31, 1868 | A. Roff | Adjustable Bit for Decorative Work | adjustable drill bits |
| 94,870 | Sep. 14, 1869 | W.A. Clark | Improved Washer-Cutter | washer cutters |
| 117,786 | Aug. 08, 1871 | D.S. Kniffen | Improvement in Plug-Cutters for Wood-Workers | hollow bits |
| 143,738 | Oct. 14, 1873 | H.E. Whipple | Washer-Cutters | washer cutters |
| 202,477 | Apr. 16, 1878 | T.O. Selfridge | Improvement in wood-boring machines | eggbeater drills |
| 234,687 | Nov. 23, 1880 | J.G. Pope | Drill Press Attachment | drill press accessories |
| 268,509 | Dec. 05, 1882 | C.C. Maltby | Washer-Cutter | washer cutters |
| 290,882 | Dec. 25, 1883 | J.W. Hicks | Machine for Cutting Circles | wood drilling and boring |
| 453,767 | Jun. 09, 1891 | J. Addison | Tool for Cutting Holes and Washers | washer cutters |
| 874,702 | Dec. 24, 1907 | E.J. Patton | Gasket or Washer Cutter | washer cutters |
| 1,859,547 | May 24, 1932 | W.H. Young | Plug cutting tool | plug cutters |
