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| All Patents in class 81/445 | |||||
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| Number | Date | Patentee | Title | Type | |
| 213,026 | Mar. 11, 1879 | D. Ackerman | Wrench For Inserting Bung-Bush | wrenches | |
| 268,408 | Dec. 05, 1882 | W.W. Jackson | Wrench For Bung Bushings | wrenches | |
| 305,035 | Sep. 09, 1884 | A.E. Lytle | Expanding Wrench and Mandrel | wrenches | |
| 1,390,371 | Sep. 13, 1921 | C. Meyer | Wrench | automotive specialty wrenches | |
| 1,563,064 | Nov. 24, 1925 | C.A. Beardmore | Screw holding screwdriver | screwdriver blades | |
| 1,688,181 | Oct. 16, 1928 | C.F. Fink | Screw holding screwdriver | screwdriver blades | |