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| Patents for Jas. F. Duhamel | |||||
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| Number | Date | Patentee | Title | Type | |
| 170,964 | Dec. 14, 1875 | W.S. Payn | Improvement in Siding Gages and Brackets | clapboard markers | |
| 184,733 | Nov. 28, 1876 | C. Sibert | Hose-Spanners | firehose and hydrant wrenches | |
| 302,229 | Jul. 22, 1884 | J.H. Beazley | Combination Tool | pliers | |
| 302,659 | Jul. 29, 1884 | W.J. Hunter | Ratchet Wrench | ratchet wrenches | |