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Patents for Daniel G. Coppin
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
58,987	Oct. 23, 1866	D.G. Coppin, G.H. Clemens	Improvement in safety valves	steam safety valves
62,476	Feb. 26, 1867	G.H. Clemens, D.G. Coppin	Improvement in lock-up safety-valves	steam safety valves
62,477	Feb. 26, 1867	G.H. Clemens, D.G. Coppin	Improvement in lock-up safety-valves	steam safety valves

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