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US Patent: 1,056,950
Engine Indicator
Patentee:
John W. Sheperdson (exact or similar names) - Johnstown, Cambria County, PA

USPTO Classifications:
346/136, 346/4, 346/49

Tool Categories:
propulsion and energy : steam apparatus : steam engine indicators

Assignees:
William L. Trill - Corry, Erie County, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Mar. 08, 1912
Granted: Mar. 25, 1913

Patent Pictures:
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The Story of the Steam Engine Indicator

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