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US Patent: 62,476
Improvement in lock-up safety-valves
Patentees:
Daniel G. Coppin (exact or similar names) - Cincinnati, OH
Gilbert H. Clemens (exact or similar names) - Cincinnati, OH

USPTO Classifications:
137/534

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John C. Crane
George W. Burkhart
Patent Dates:
Granted: Feb. 26, 1867

Patent Pictures:
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Report data errors or omissions to steward Jeff Joslin
Description:
Of interest because co-inventor Clemens also held sawmill patents.

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