| All Patents in class 81/439 |
Patents 1 -
15
of 28
      |
| Number | Date | Patentee | Title | Type |
| 190,119 | May 01, 1877 | B.L. Budd | Improvement in Screw-Drivers | screwdrivers |
| 366,439 | Jul. 12, 1887 | T. Troy | Reversible Screw Driver | screwdriver mechanisms |
| 466,220 | Dec. 29, 1891 | T.H. Buffington | Screw Driver | screwdrivers |
| 504,757 | Sep. 12, 1893 | A. Schuermann | Screwdriver | screwdriver blades |
| 537,246 | Apr. 09, 1895 | A.B. Stone | pocket screwdriver | screwdriver mechanisms |
| 592,176 | Oct. 19, 1897 | L.S. Starrett | Reversible Pocket Tool | screwdrivers |
| 686,424 | Nov. 12, 1901 | W.J. Smith | Screwdriver Kit | screwdrivers |
| 814,020 | Mar. 06, 1906 | H.A. Clifford | Convertible Tool Handle | screwdriver handles |
| 939,079 | Nov. 02, 1909 | W.A. Peck | Tool Holder | tool holders |
| 1,236,258 | Aug. 07, 1917 | J.B. Brown | Tool Holder | tool holders |
| 1,441,950 | Jan. 09, 1923 | H. Simon | Simore Lightning Change | screwdriver mechanisms |
| 1,689,376 | Oct. 30, 1928 | J. Zilliox | Multiple Bit Tool | screwdrivers |
| 1,783,070 | Nov. 25, 1930 | F.R. Bergmann | Screw holding screwdriver | screwdriver blades |
| 2,148,573 | Feb. 28, 1939 | C.J. Mulcay | Wrench | wrenches |
| 2,158,728 | May 16, 1939 | F.W. Peters | Tool Handle | screwdriver handles |
