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US Patent: 1,980,789
Control Apparatus
Patentee: Earnest J. dill (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 236/1H, 236/91F, 236/91R, 236/9R Tool Categories: industrial machines : industrial machine mechanisms : industrial control apparatus : flow controls industrial tools : pressure regulators Assignees: Detroit Lubricator Co. - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 27, 1933 Granted: Nov. 13, 1934 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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