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US Patent: 310,978
Rotary valve for steam-engines
Patentee: John L. Bogert (exact or similar names) - Flushing, NY USPTO Classifications: 91/179 Tool Categories: propulsion and energy : steam engines : steam engine valves Assignees: None Manufacturer: John L. Bogert - Flushing, NY Witnesses: William G. Mott Harold Serrell	Patent Dates: Applied: Jun. 25, 1884 Granted: Jan. 20, 1885 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for John L. Bogert
Description: Improvements to the inventor's earlier valve design in patent 298,063.

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