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US Patent: 442,963
Rotary Gas Engine
Patentee: John Henry Eichler (exact or similar names) - San Francisco, CA USPTO Classifications: 123/162, 123/210, 123/225, 123/346, 123/405, 418/263, 418/43 Tool Categories: propulsion and energy : internal combustion engines : rotary engines Assignees: None Manufacturer: Union Gas Engine Co. - San Francisco, CA Witnesses: Unknown	Patent Dates: Applied: Jun. 04, 1890 Granted: Dec. 16, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Union Gas Engine Co.

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