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US Patent: 424,000
Rotary Gas Engine
Patentee: George E. Hibbard (exact or similar names) - Chicago, IL USPTO Classifications: 123/153, 123/220, 123/223, 123/46R, 123/65B, 123/70R, 418/195 Tool Categories: propulsion and energy : internal combustion engines : rotary engines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 12, 1887 Granted: Mar. 25, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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