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US Patent: 204,649
Piston-Valve for Engines
Patentee: Robert W. Aitken (exact or similar names) - Buffalo, Erie County, NY USPTO Classifications: 137/625.69 Tool Categories: propulsion and energy : steam engines : steam engine valves Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 29, 1878 Granted: Jun. 11, 1878 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Buffalo Pitts Co.

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