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US Patent: 1,189,764
Relief-valve for internal-combustion engines
Patentee: Henry L. Whitman (exact or similar names) - St. Louis, MO USPTO Classifications: 137/528, 220/86.2, 251/147, 251/367 Tool Categories: propulsion and energy : internal combustion engines Assignees: None Manufacturer: Whitman Agricultural Co. - St. Louis, MO Witnesses: E. Clark E. B. Linn	Patent Dates: Applied: Dec. 15, 1913 Granted: Jul. 04, 1916 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Whitman Agricultural Co.

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