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US Patent: 222,376
Expansion-Valve for Steam Engines
Patentee:
Alexis Bretonneau Fils (exact or similar names) - Mortague-sur-Sevre, France

USPTO Classifications:
91/259

Tool Categories:
propulsion and energy : steam engines : steam engine valves

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Oct. 11, 1879
Granted: Dec. 09, 1879

Patent Pictures:
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