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US Patent: 2,138,644
Piston structure for uniflow steam engines
Patentee: Everett C. Read (exact or similar names) - Milwaukee, WI USPTO Classifications: 92/175 Tool Categories: propulsion and energy : steam engines Assignees: Filer & Stowell Co. - Milwaukee, WI Manufacturer: Filer & Stowell Co. - Milwaukee, WI Witnesses: Unknown	Patent Dates: Applied: Jun. 24, 1937 Granted: Nov. 29, 1938 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Filer & Stowell Co.

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