| All Patents in class 408/189 |
Patents 1 -
15
of 26
      |
| Number | Date | Patentee | Title | Type |
| 25,348 | Sep. 06, 1859 | H. Pennie | Bit for Cutting Circular Washers | washer cutters |
| 50,600 | Oct. 24, 1865 | O.A. Smith, C.A. King | Improved Tool for Cutting Washers | |
| 72,436 | Dec. 17, 1867 | A. Wippo | Auger & Rounder for Installing Casters | auger bits |
| 80,059 | Jul. 21, 1868 | A.M. Connett | Bit stock; circle cutter on graduated arm of stock | braces |
| 94,870 | Sep. 14, 1869 | W.A. Clark | Improved Washer-Cutter | washer cutters |
| 107,700 | Sep. 27, 1870 | P. McCormick | Improvement in Washer-Cutters | washer cutters |
| 112,063 | Feb. 21, 1871 | J.C. Mills | Improvement in Auger-Bits | adjustable drill bits |
| 120,827 | Nov. 14, 1871 | R.L. Priester | Improvement in Augers for Boring Boxes | auger bits |
| 160,015 | Feb. 23, 1875 | D. Goodnow, Jr. | Improvement in Devices for Cutting out Sheet-Metal Washers | washer cutters |
| 168,607 | Oct. 11, 1875 | E. Brule | Improvement in Washer-Cutters | washer cutters |
| 170,527 | Nov. 30, 1875 | C. Crammer | Improvement in Expansible Tools For Cutting Holes of Different Sizes | adjustable drill bits |
| 177,982 | May 30, 1876 | J.S. Appleton | Improvement in Washer-Cutters | washer cutters |
| 182,744 | Oct. 03, 1876 | J. Bowen | Bung Cutter | bung making machines |
| 209,726 | Nov. 05, 1878 | W.F. Tilton | Improvement in Devices for Cutting Washers | washer cutters |
| 210,553 | Dec. 03, 1878 | A.J. Palmer | Brace for cutting leather washers | braces |
