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US Patent: 39,530
Improved steam-boiler
Patentee: Treat T. Prosser (exact or similar names) - Fond du Lac, WI USPTO Classifications: 122/36 Tool Categories: propulsion and energy : steam apparatus : stationary boilers Assignees: K. A. Darling - Fond du Lac, WI M. C. Darling - Fond du Lac, WI Treat T. Prosser - Fond du Lac, WI Manufacturer: Not known to have been produced Witnesses: Daniel E. Groux H. King	Patent Dates: Granted: Aug. 11, 1863 Reissue Information: Reissued as RE1,585 (Dec. 01, 1863) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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