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| Patents for William G. Hoffman | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 178,157 | May 30, 1876 | A.P. Johnson | Improvement in machines for shaping wooden chair-seats | |
 | 189,613 | Apr. 17, 1877 | E.C. Dicey | Improvement in lath machines | |
 | 594,348 | Nov. 23, 1897 | J.J. Haldeman | Pipe Wrench | |