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US Patent: 1,807,625
Valve Wrench
Patentee:
Hendrick Julius Hjorth (exact or similar names) - Woburn, MA

USPTO Classifications:
175/315, 175/404, 251/291, 251/293, 7/158, 7/169, 81/119, 81/182

Tool Categories:
wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: May 28, 1930
Granted: Jun. 02, 1931

Patent Pictures:
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Description:
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