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| Patents for Henry H. Hamlett | |||||
| Number | Date | Patentee | Title | Type | |
| 656,135 | Aug. 14, 1900 | H.H. Hamlett | Hammer Press | forging presses | |
| 862,391 | Aug. 06, 1907 | H.H. Hamlett | Power Press | forging presses | |