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US Patent: 2,137,972
Illuminated gauge
Patentees: Harry S. Baker (exact or similar names) - Arlington, Middlesex County, MA Joseph W. Motherwell (exact or similar names) - Melrose, Middlesex County, MA USPTO Classifications: 220/304, 362/23.01, 362/23.17 Tool Categories: gauges : gauge illuminating apparatus Assignees: Ashton Valve Co. - Cambridge, Middlesex County, MA Manufacturer: Ashton Valve Co. - Boston, Middlesex County, MA Witnesses: Unknown	Patent Dates: Applied: May 07, 1936 Granted: Nov. 22, 1938 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Ashton Valve Co.

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