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