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