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US Patent: 1,719,801
Valve
Patentee:
George B. Duffield (exact or similar names) - Detroit, Wayne County, MI

USPTO Classifications:
251/220, 251/286, 411/411, 411/417

Tool Categories:
hardware : valves

Assignees:
Detroit Lubricator Co. - Detroit, Wayne County, MI

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: May 10, 1926
Granted: Jul. 02, 1929

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

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