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US Patent: 2,213,181
Pressure Relief Device
Patentee: Adolf Von Wangenheim (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 137/467, 251/73, 251/75, 251/89, 92/99 Tool Categories: industrial tools : pressure regulators Assignees: Detroit Lubricator Co. - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 08, 1936 Granted: Aug. 27, 1940 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Detroit Lubricator Co.

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