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US Patent: 2,359,477
Method of Making Hollow Head Valves
Patentee: Joseph H. Hoern (exact or similar names) - Birmingham, Oakland County, MI USPTO Classifications: 29/520, 29/888.451, 428/34.1, 428/583, 428/586 Tool Categories: propulsion and energy : internal combustion engines : internal combustion engine valves Assignees: Eaton Mfg. Co. - Cleveland, Cuyahoga County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 03, 1942 Granted: Oct. 03, 1944 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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