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US Patent: 2,566,173
Pilot Operated Valve
Patentee: Earnest J. Dillman (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 137/625.5, 236/80R, 251/14, 251/28, 251/41 Tool Categories: hardware : valves specialty machines : heating apparatus Assignees: Detroit Lubricator Co. - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 23, 1949 Granted: Aug. 28, 1951 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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