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US Patent: 430,310
Double Acting Explosive Engine
Patentee: John W. Eisenhuth (exact or similar names) - San Francisco, CA USPTO Classifications: 123/63 Tool Categories: propulsion and energy : steam engines Assignees: Electric Vapor Engine Co. - San Francisco, CA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 06, 1889 Granted: Jun. 17, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Electric Vapor Engine Co. "Vintage Machinery" entry for Union Gas Engine Co.

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