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| Patents for Daniel G. Coppin | |||||
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| Number | Date | Patentee | Title | Type | |
| 58,987 | Oct. 23, 1866 | G.H. Clemens, D.G. Coppin | Improvement in safety valves | ||
| 62,476 | Feb. 26, 1867 | D.G. Coppin, G.H. Clemens | Improvement in lock-up safety-valves | ||
| 62,477 | Feb. 26, 1867 | G.H. Clemens, D.G. Coppin | Improvement in lock-up safety-valves | ||