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US Patent: 1,028,154
Continuous Indicator for Engines
Patentee: William L. Trill (exact or similar names) - Corry, Erie County, PA USPTO Classifications: 346/118, 346/4, 346/72 Tool Categories: propulsion and energy : steam apparatus : steam engine indicators Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 19, 1908 Granted: Jun. 04, 1912 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens The Story of the Steam Engine Indicator

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