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US Patent: 2,091,228
Control Device
Patentee: Albert G. Hann (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 137/400, 137/421, 251/66 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: Jan. 30, 1935 Granted: Aug. 24, 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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