| All Patents in class 411/919 |
Patents 16 -
23
of 23
      |
| Number | Date | Patentee | Title | Type |
| 1,908,080 | May 09, 1933 | J.P. Thompson | Screw | |
| 2,046,343 | Jul. 07, 1936 | H.F. Phillips | Screw | |
| 2,046,837 | Jul. 07, 1936 | H.F. Phillips | Means for Uniting a Screw with a Driver | |
| 2,046,838 | Jul. 07, 1936 | H.F. Phillips | Screw Driver | screwdrivers |
| 2,046,839 | Jul. 07, 1936 | T.M. Fitzpatrick, H.F. Phillips | Screw | |
| 2,046,840 | Jul. 07, 1936 | T.M. Fitzpatrick, H.F. Phillips | Screw Driver | screwdrivers |
| 2,103,944 | Dec. 28, 1937 | A.V. Gullborg | Screw Part and Driver | socket wrenches |
| 2,372,269 | Mar. 27, 1945 | L.J. Golan | Theft Resisting Nut and Wrench Combination | socket wrenches |
