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