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US Patent: 2,147,945
Control Device
Patentees: Albert G. Hann (exact or similar names) - Detroit, Wayne County, MI Philip S. Russel (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 251/129.02, 251/129.18, 251/285 Tool Categories: industrial machines : industrial machine mechanisms : industrial control apparatus : flow controls Assignees: Detroit Lubricator Co. - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 18, 1936 Granted: Feb. 21, 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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