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US Patent: 206,558
Valve Action of Duplex Engines and Pumps
Patentee: William H. Guild, Jr. (exact or similar names) - Brooklyn, Kings County, NY USPTO Classifications: 91/189R Tool Categories: propulsion and energy : steam engines : steam engine valves industrial machines : pumps : pump valves Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 12, 1878 Granted: Jul. 30, 1878 Reissue Information: Reissued as RE9,857 (Sep. 06, 1881) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Guild & Garrison

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