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| Patents for Charles Merrill & Sons | |||||
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| Number | Date | Patentee | Title | Type | |
| 36,459 | Sep. 16, 1862 | F. Cheney, W.F. Goulding | Improvement in Drop-Presses | drop hammers | |
| 42,581 | May 03, 1864 | B. Hotchkiss | Power Hammer | trip and helve hammers | |
| 51,267 | Nov. 28, 1865 | E.A. Raymond | Improvement in Forging Apparatus | steam hammers | |
| 69,518 | Oct. 01, 1867 | W.H. Waters | Drop Hammer | drop hammers | |