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US Patent: 2,275,624
Control Device
Patentee: Albert G. Hann (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 236/68R, 251/11, 251/120, 251/122, 251/263 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: Aug. 26, 1940 Granted: Mar. 10, 1942 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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