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US Patent: 538,042
Steam Engine Indicator
Patentee:
William Houghtaling - Bridgeport, Fairfield County, CT

USPTO Classifications:
346/5

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

Assignees:
Ashcroft Mfg. Co. - Bridgeport, Fairfield County, CT

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 31, 1894
Granted: Apr. 23, 1895

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Ashcroft Mfg. Co.
Description:
Patented in England, 20 Feb 1894, #3627.

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