| All Patents in class 81/457 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 491,687 | Feb. 14, 1893 | J.R. Quimby | Attachment for Screwdriver | screwdriver mechanisms |
| 774,112 | Nov. 01, 1904 | W. Rundquist | Screw Gripping Screwdriver | screwdriver blades |
| 1,641,307 | Sep. 06, 1927 | R.J. Velepec | Screw Driver | screwdrivers |
| 1,645,753 | Oct. 18, 1927 | E. Hanson | Screw holding screwdriver | screwdriver blades |
| 2,796,100 | Jun. 18, 1957 | H.E. Dierker | Screw Holding Screwdriver | screwdriver blades |
| 2,884,971 | May 05, 1959 | H.E. Dierker | Screw holding screwdriver | screwdriver blades |
