| All Patents of Type: screwdriver blades |
Patents 1 -
15
of 100
      |
| Number | Date | Patentee | Title | Type |
| 39,206 | Jul. 14, 1863 | J.A. Ayres | Improved Screwdriver | screwdriver blades |
| 45,854 | Jan. 10, 1865 | G. Parr | Improvement in Mode of Manufacturing Screw Drivers | screwdriver blades |
| 50,021 | Sep. 19, 1865 | J.S. McCurdy | Improvement in Screw-Drivers | screwdriver blades |
| 50,328 | Oct. 10, 1865 | W.G. Bonwill | Improvement in Screw-Drivers | screwdriver blades |
| 57,107 | Aug. 14, 1866 | C. Eversol | Improved Screw Driver | ratcheting screwdrivers |
| 67,014 | Jul. 23, 1867 | J.A. Ayres | Improved Screw-Driver | screwdriver blades |
| 74,490 | Feb. 18, 1868 | J.A. Bidwell | Screwdriver and Countersink | screwdriver blades |
| 79,509 | Jun. 30, 1868 | N. Smith | Screw holding screwdriver | screw starters |
| 96,263 | Oct. 26, 1869 | J.C. Pinner | Screw holding screwdriver | screwdriver blades |
| 101,207 | Mar. 29, 1870 | A.S. Apgar | Improvement in Screw and Screw-Driver | screwdriver blades |
| 108,383 | Oct. 18, 1870 | A. Newton | Screw holding screwdriver | screwdriver blades |
| 115,582 | Jun. 06, 1871 | J.P. Curtiss | Improvement in Screwdrivers | screwdriver blades |
| 139,069 | May 20, 1873 | C. Law | Improvement in Screw Drivers | screwdriver blades |
| 145,506 | Dec. 16, 1873 | S.R. Kneeland | Improvement in Screwdrivers | screwdriver blades |
| 147,654 | Feb. 17, 1874 | S.R. Kneeland | Improvement in Screwdriver blades | screwdriver blades |
