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US Patent: 1,689,191
Water Column
Patentee: William O. Ashe (exact or similar names) - New York, NY USPTO Classifications: 73/293, 73/297 Tool Categories: transportation : railroads : railroad locomotives : boiler water gauges Assignees: Nathan Mfg. Co. - New York, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 16, 1921 Granted: Oct. 30, 1928 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Nathan Mfg. Co.

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