| All Patents in class 81/438 |
Patents 16 -
30
of 43
      |
| Number | Date | Patentee | Title | Type |
| 729,004 | May 26, 1903 | L.S. Starrett | Screw-Driver | screwdriver mechanisms |
| 730,509 | Jun. 09, 1903 | R. Baker | Adjustable Implement Holder | screwdriver handles |
| 733,126 | Jul. 07, 1903 | C.F. Bellows | Tool Holder | tool holders |
| 842,107 | Jan. 22, 1907 | S.G. North | Removable-Blade Screw-Driver | screwdriver blades |
| 878,224 | Feb. 04, 1908 | P. Cattuci, A.F. Meisselbach | Pocket Tool | screwdrivers |
| 925,115 | Jun. 15, 1909 | A. Loewenberg | Screw holding screwdriver | screwdriver blades |
| 953,434 | Mar. 29, 1910 | R.J. Northam | Tool Holder | tool holders |
| 1,056,484 | Mar. 18, 1913 | P. Anderholm | Reversible Screwdriver | screwdriver handles |
| 1,057,101 | Mar. 25, 1913 | L.E. Watcher | Watch Screw-Driver | screwdriver blades |
| 1,413,101 | Apr. 18, 1922 | S.J. Cushing | Tool Holder | tool holders |
| 1,448,895 | Mar. 20, 1923 | H.A. Yotta | Tool | screwdriver mechanisms |
| 1,743,505 | Jan. 14, 1930 | E. Turgeon | Screwdriver | screwdrivers |
| 1,824,623 | Sep. 22, 1931 | P.L. Robertson | Tool Holder | tool holders |
| 2,037,681 | Apr. 14, 1936 | C.S. Gates | Tool Holder | tool holders |
| 2,287,457 | Jun. 23, 1942 | F.A. Volz, A.L. Stowell | Screw driver | screwdriver blades |
