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US Patent: 2,355,916
Relief Valve
Patentee:
Erling Klafstad (exact or similar names) - Belmont, Middlesex County, MA

USPTO Classifications:
137/471, 137/477, 137/535, 251/296, 411/513

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Dec. 15, 1941
Granted: Aug. 15, 1944

Patent Pictures:
USPTO (New site tip)
Google Patents
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