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US Patent: 81,878
Improvement in steam safety-valves
Patentees:
Everett Clemens - New York, NY
Gilbert H. Clemens - New York, NY

USPTO Classifications:
137/534

Tool Categories:
propulsion and energy : steam apparatus : steam safety valves

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
George D. Walker
Charles H. Smith

Patent Dates:
Granted: Sep. 08, 1868

Patent Pictures:
USPTO pdf tiff
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