| All Patents in class 72/378 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 300,445 | Jun. 17, 1884 | L. Chapman | Manufacture of Wrench Forgings | wrench components |
| 315,530 | Apr. 14, 1885 | S. Moore | Manufacture of Drills | making drills and augers |
| 1,385,976 | Jul. 26, 1921 | E. Walker | Method of making crown-openers | combination cork extractors |
| 2,182,922 | Dec. 12, 1939 | E.A. Heschel | Method of Producing a Socket Wrench Head | wrench sockets |
| 2,206,292 | Jul. 02, 1940 | B.F. Rosenberg | Method of Making a Drill Sleeve | drilling and boring tool holders |
| 2,340,529 | Feb. 01, 1944 | W.W. Hartman | Method of Making Socket Wrenches | making wrenches |
| 2,430,368 | Nov. 04, 1947 | J.J. Reardon | Apparatus and Method for Drawing and Broaching Socket Wrenches | making wrenches |
| 3,464,251 | Sep. 02, 1969 | R.W. Johns | Tube Tapering Device With Variable Die Orifice | metal swaging machines |
