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US Patent: 1,349,884
Diaphragm Gage
Patentee:
Frank H. Hopkins (exact or similar names) - Somerville, Middlesex County, MA

USPTO Classifications:
73/729.1, 92/45

Tool Categories:
gauges : vacuum and pressure gauges
industrial machines : industrial recording apparatus
industrial tools : pressure indicators

Assignees:
American Steam Gauge & Valve Mfg. Co. - Boston, Suffolk County, MA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 11, 1917
Granted: Aug. 17, 1920

Patent Pictures:
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Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for American Steam Gauge Co.

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