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| Patents for William B. W. Hallett | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 74,490 | Feb. 18, 1868 | J.A. Bidwell | Screwdriver and Countersink | |
 | 203,262 | May 07, 1878 | G.S. Goodspeed | Wrench | |