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US Patent: 67,659
Gas Engine
Patentees: Eugen Langen (exact or similar names) - Cologne, Prussia Nicolaus August Otto (exact or similar names) - Cologne, Prussia USPTO Classifications: 123/188.2, 123/22, 91/270, 92/136, 92/140 Tool Categories: propulsion and energy : internal combustion engines : gas and gasoline engines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Aug. 13, 1867 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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