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US Patent: 37,980
Steam Engine Indicator
Patentee: C. B. Richards (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 346/5 Tool Categories: propulsion and energy : steam apparatus : steam engine indicators Assignees: C. T. Porter - New York, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Mar. 24, 1863 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens Richards Steam Engine Indicator, ca 1864 The Story of the Steam Engine Indicator
Description: This was the first steam engine indicator patented in the U. S.

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