| All Patents in class 81/57 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 322,937 | Jul. 28, 1885 | E.M. Hungerford | Improvement in Rotary and Stationary Wrenches | wrenches |
| 429,075 | May 27, 1890 | W. Wells | Improvement in Wrenches For Fish-Plate Bolts | socket wrenches |
| 542,317 | Jul. 09, 1895 | W.J. Shea | Wrench | wrenches |
| 703,898 | Jul. 01, 1902 | J.C. Davison | Wrench | quick adjust wrenches |
| 858,894 | Jul. 02, 1907 | A.L. Moss | Wrench | ratchet wrenches |
| 1,684,633 | Sep. 18, 1928 | A. Levedahl | Screw or nut driving device for portable power-driven rotary tools | handheld power tools |
| 1,733,288 | Oct. 29, 1929 | C.M. Tune | Pistol-grip wrench | |
| 1,827,269 | Oct. 13, 1931 | G.E. Smith | Tool driving apparatus | handheld power tools |
| 1,970,721 | Aug. 21, 1934 | A. Walton | Rachet Wrench | auxiliary levers on wrenches |
| 2,107,108 | Feb. 01, 1938 | J. De Mooy | Rotary Tool | pneumatic tools |
| 2,616,323 | Nov. 04, 1952 | L.A. Leifer | Power Actuated Wrench | metal lathe accessories and attachments |
| 5,142,952 | Sep. 01, 1992 | K.C. Happ, M.S. Scolaro, G.A. Putney | Ratchet Tool | |
| 5,231,901 | Aug. 03, 1993 | M.S. Scolaro, G.A. Putney | Ratchet Tool | |
