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US Patent: 138,524
Water Indicator for Steam Boilers
Patentee: Albert P. Pitkin (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 73/332 Tool Categories: propulsion and energy : steam apparatus : stationary boilers : boiler level gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 20, 1873 Granted: May 06, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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