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US Patent: 41,182
Steam Engine Indicator
Patentees: S. Lloyd Wiegand (exact or similar names) - Philadelphia, PA William B. Le Van (exact or similar names) - Philadelphia, PA USPTO Classifications: 346/139R, 346/4, 346/49, 73/712, 73/715, 74/1R Tool Categories: propulsion and energy : steam apparatus : steam engine indicators Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Jan. 05, 1864 Antedated: Dec. 21, 1863 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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