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| Patents for Roswell W. Keene | |||||
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| Number | Date | Patentee | Title | Type | |
| 247,987 | Oct. 04, 1881 | W.H. Brock | Chain Wrench | chain and strap wrenches | |
| 250,641 | Dec. 13, 1881 | W.H. Brock | Chain Wrench | chain and strap wrenches | |