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US Patent: 1,231,572
Valve mechanism
Patentee: Frank M. Davis (exact or similar names) - Milwaukee, WI USPTO Classifications: 123/188.2, 123/41.74, 123/55.4, 123/90.61 Tool Categories: propulsion and energy : internal combustion engines : internal combustion engine valves Assignees: None Manufacturer: Davis Manufacturing Co. - Milwaukee, WI Witnesses: George M. Kliegel Henry L. Lueders	Patent Dates: Applied: Jul. 17, 1913 Granted: Jul. 03, 1917 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Davis Manufacturing Co.

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