| All Patents in class 409/275 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 395,213 | Dec. 25, 1888 | M.E. Campfield | Machine For Truing and Dressing Wrench Blanks | |
| 489,523 | Jan. 10, 1893 | V.F. Carpenter | Wrench Milling Machine | making wrenches |
| 1,170,010 | Feb. 01, 1916 | M.A. Smith | Automatic metal-shaping machine | metal shapers |
| 1,815,647 | Jul. 21, 1931 | L.H. Blood | Broaching Machine | broaching machines |
| 1,848,044 | Mar. 01, 1932 | L.H. Blood | Broaching Machine | broaching machines |
| 2,044,496 | Jun. 16, 1936 | E.C. Bullard | Stationary Tool Metal Working Apparatus | |
| 2,282,720 | May 12, 1942 | W.L. Groene | Crankshaft Broaching Lathe | metalworking machine mechanisms |
| 2,315,476 | Mar. 30, 1943 | W.L. Groene | Broaching Machine | broaching machines |
| 2,333,337 | Nov. 02, 1943 | C.M. Beach, E.C. Rachrs | Broaching Machine | broaching machines |
