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US Patent: 991,843
Engine Indicator
Patentee:
James F. Gill (exact or similar names) - Bootle, Surrey County, England

USPTO Classifications:
346/150.1, 346/4

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Mar. 11, 1909
Granted: May 09, 1911

Patent Pictures:
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