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| Patents for E. T. Ketcham | |||||
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| Number | Date | Patentee | Title | Type | |
| 822,017 | May 29, 1906 | J. Roemer | Pipe Wrench | chain and strap wrenches | |
| 871,958 | Nov. 26, 1907 | J. Roemer | Pipe Wrench | chain and strap wrenches | |