| All Patents in class 81/57.3 |
Patents 16 -
22
of 22
      |
| Number | Date | Patentee | Title | Type |
| 1,420,635 | Jun. 27, 1922 | A.C. Klopper | Wrench | socket wrenches |
| 1,423,142 | Jul. 18, 1922 | R.H. Owens | Wrench | automotive specialty wrenches |
| 1,578,331 | Mar. 30, 1926 | R.D. Litwiller | Thrashing Machine Cylinder Wrench | cylinder tooth wrenches |
| 1,679,155 | Jul. 31, 1928 | E.L. Connell | Power hand tool | |
| 1,970,721 | Aug. 21, 1934 | A. Walton | Rachet Wrench | auxiliary levers on wrenches |
| 2,601,798 | Jul. 01, 1952 | H.U. Spence | Socket Wrench | socket wrenches |
| 3,270,595 | Sep. 06, 1966 | J.A. Blachowski, E.L. Hall | Offset Drive Attachment with Reversing Means | auxiliary wrenches |
