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| Patents for Charles S. Hamlin | |||||
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| Number | Date | Patentee | Title | Type | |
| 432,528 | Jul. 22, 1890 | C.S. Hamlin, A.C. Harper | Machine for Punching and Riveting | rivet making machines | |
| 585,865 | Jul. 06, 1897 | C.S. Hamlin | Pipe Truing Lathe | pipe making machines | |