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US Patent: 444,834
Rotary Engine
Patentee: John W. Hayes (exact or similar names) - Portsmouth, Rockingham County, NH USPTO Classifications: 418/115, 418/139, 418/144, 418/151, 418/246 Tool Categories: propulsion and energy : steam apparatus : rotary steam engines Assignees: John W. Hayes - Portsmouth, Rockingham County, NH Marcellus Eldredge - Portsmouth, Rockingham County, NH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 03, 1890 Granted: Jan. 20, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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