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US Patent: 2,100,997
Pressure Control Device
Patentee: Philip S. Russel (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 137/115.14, 137/508, 137/510, 417/303 Tool Categories: industrial tools : pressure regulators 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: Jun. 18, 1935 Granted: Nov. 30, 1937 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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