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US Patent: 2,172,823
Control Device
Patentee: Adolf Von Wangenheim (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 337/404, 337/41, 337/414 Tool Categories: industrial machines : industrial machine mechanisms : industrial control apparatus : temperature controls Assignees: Detroit Lubricator Co. - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 20, 1936 Granted: Sep. 12, 1939 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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