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US Patent: 155,087
Hot Air Engines
Patentee: Joseph Hirsch (exact or similar names) - Lyons, France USPTO Classifications: 123/41.72, 123/65VB, 123/65WA, 123/72, 60/619, 60/712, 92/212 Tool Categories: propulsion and energy : external combustion engines : hot air engines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 25, 1874 Granted: Sep. 15, 1874 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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