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US Patent: 540,757
Vapor Engine
Patentee:
Frank W. Ofeldt (exact or similar names) - Jersey City, Hudson County, NJ

USPTO Classifications:
122/250R, 417/399, 91/334, 91/481, 92/72

Tool Categories:
propulsion and energy : internal combustion engines

Assignees:
Marine Vapor Engine Co. - Jersey City, Hudson County, NJ

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jan. 18, 1893
Granted: Jun. 11, 1895

Patent Pictures:
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