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| Patents for W. E. Simpson | |||||
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| Number | Date | Patentee | Title | Type | |
| 132,823 | Nov. 05, 1872 | P.L. Gibbs | Improvement in Wrenches | ratchet wrenches | |
| 134,287 | Dec. 24, 1872 | W.S. Jarboe | Apparatus for Grinding Lathe Centers | lathe centers | |