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US Patent: 504,723
Hydrocarbon Engine
Patentee: Alexander Gray (exact or similar names) - London, Middlesex County, England USPTO Classifications: 123/531, 123/555, 261/40, 261/76, 261/78.1 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 24, 1891 Granted: Sep. 12, 1893 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: Patented in England, 06 Jan 1891, #191; in France, 09 Nov 1891, #217,298 and in Germany, 13 Nov 1891, #64,339.

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