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US Patent: 912,680
Steam Engine and Like Indicator
Patentee:
Bertram Hopkinson (exact or similar names) - Cambridge, Cambridgeshire County, England

USPTO Classifications:
346/107.5, 346/4, 73/113.01

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 14, 1907
Granted: Feb. 16, 1909

Patent Pictures:
USPTO (New site tip)
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The Story of the Steam Engine Indicator

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