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| Patents for Charles L. Coffin | |||||
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| Number | Date | Patentee | Title | Type | |
| 435,283 | Aug. 26, 1890 | C.L. Coffin | Method of and Apparatus for Welding by Electricity | welding apparatus | |
| 543,654 | Jul. 30, 1895 | F.B. Rae | Electric Soldering Iron | soldering irons | |