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GB Patent: GB-186,101,598
Improvements in indicators such as are used for ascertaining the power developed by steam engines
Patentees: John Hamilton (exact or similar names) - Glasgow, Scotland John Hannan (exact or similar names) - Glasgow, Scotland USPTO Classifications: Tool Categories: propulsion and energy : steam apparatus : steam engine indicators Assignees: None Manufacturer: Hannan & Buchanan - Glasgow, Scotland Witnesses: Unknown	Patent Dates: Granted: Jun. 21, 1861 Patent Pictures: Espacenet patent Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hannan & Buchanan
Description: This patent received provisional protection only.

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