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US Patent: 1,380,094
Safety Valve
Patentee:
George H. Clark (exact or similar names) - Melrose, Middlesex County, MA

USPTO Classifications:
137/473, 137/478, 137/542

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

Assignees:
c - Boston, Suffolk County, MA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Mar. 30, 1920
Granted: May 31, 1921

Patent Pictures:
USPTO (New site tip)
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