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US Patent: 1,480,684
Spring Link
Patentee:
William S. Hudson (exact or similar names) - West Medford, Middlesex County, MA

USPTO Classifications:
74/594

Tool Categories:
gauges : vacuum and pressure gauges

Assignees:
Ashton Valve Co. - Cambridge, Middlesex County, MA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Oct. 19, 1922
Granted: Jan. 15, 1924

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Ashton Valve Co.

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