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US Patent: 44,561
Improvement in feed-water heaters and filters
Patentee: Edwin R. Stilwell (exact or similar names) - Dayton, OH USPTO Classifications: 261/114.1 Tool Categories: propulsion and energy : steam apparatus : stationary boilers : feedwater apparatus Assignees: None Manufacturer: Stilwell & Bierce Mfg. Co. - Dayton, OH Witnesses: Charles H. Crawford Thomas F. Thresher	Patent Dates: Granted: Oct. 04, 1864 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Stilwell-Bierce & Smith-Vaile Co.

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