| All Patents in class 408/189 |
Patents 16 -
26
of 26
      |
| Number | Date | Patentee | Title | Type |
| 217,505 | Jul. 15, 1879 | R.J. Bartley | Improvement in Washer-Cutters | washer cutters |
| 268,509 | Dec. 05, 1882 | C.C. Maltby | Washer-Cutter | washer cutters |
| 296,219 | Apr. 01, 1884 | J. Rath | Washer-cutter | washer cutters |
| 310,527 | Jan. 06, 1885 | H.E. Koepka | Washer-Cutter | washer cutters |
| 338,997 | Mar. 30, 1886 | P. McCauley | Expansible Auger | adjustable drill bits |
| 605,407 | Jun. 07, 1898 | C. Dumaw, Jr. | Countersinker | countersinks |
| 654,861 | Jul. 31, 1900 | J.J. Tynan | Boring Tool | wood drill bits |
| 810,602 | Jan. 23, 1906 | C. Baar | Boring-tool | countersinks |
| 857,647 | Jun. 25, 1907 | G.T. Miller | Gasket-Cutter | washer cutters |
| 860,020 | Jul. 16, 1907 | J.H. Dearholt | Boring-Tool or Auger | adjustable drill bits |
| 2,954,570 | Oct. 04, 1960 | A. Couch | Holder for Plural Thread Chasing Tools Including Tool Clamping Block With Lubrication Passageway | metalworking machine tool holders |
