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US Patent: 257,494
Gas-exhaust regulator
Patentee: Reuben Kidder Huntoon (exact or similar names) - Franklin, MA USPTO Classifications: 137/505.31, 48/173 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: E. B. Pratt R. H. Eddy	Patent Dates: Applied: Nov. 21, 1881 Granted: May 09, 1882 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for R. K. Huntoon

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