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US Patent: 77,373
Rotary Engine
Patentee: Dexter D. Hardy (exact or similar names) - Cincinnati, Hamilton County, OH USPTO Classifications: 418/206.5 Tool Categories: propulsion and energy : steam apparatus : rotary steam engines Assignees: Henry J. Behrens - New York, NY Henry C. Dart - New York, NY Edward Dart - New York, NY Manufacturer: Henry J. Dart & Co. - New York, NY Witnesses: George H. Knight James H. Layman H. G. Webber	Patent Dates: Granted: Apr. 28, 1868 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Henry J. Dart & Co.

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