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US Patent: 6,324
Piston-valve cut-off
Patentee: Gordon McKay (exact or similar names) - Pittsfield, MA USPTO Classifications: 83/231, 91/259 Tool Categories: propulsion and energy : steam engines : steam check valves Assignees: None Manufacturer: McKay & Hoadley - Pittsfield, MA Witnesses: T. A. Sedgwick James W. Gowan	Patent Dates: Granted: Apr. 17, 1849 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for McKay & Hoadley

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