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US Patent: 1,490,210
Meter
Patentee: Zen Hsieh (exact or similar names) - Wilkinsburg, Allegheny County, PA USPTO Classifications: 116/284, 235/70C, 33/832 Tool Categories: electrical devices : electrical measuring apparatus Assignees: Westinghouse Electric & Mfg. Co. - Wilmerding, Allegheny County, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 13, 1920 Granted: Apr. 15, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Westinghouse Electric & Manufacturing Co.

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