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US Patent: 2,494,395
Magnetically Operated Safety Valve Closing Device
Patentee: Walter S. Landon (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 137/400, 137/423, 251/65 Tool Categories: industrial machines : industrial machine mechanisms : industrial control apparatus : flow controls industrial machines : industrial machine mechanisms : industrial control apparatus : liquid level controls Assignees: Detroit Lubricator Co. - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 13, 1944 Granted: Jan. 10, 1950 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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