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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: USPTO (New site tip) Google Patents Report data errors or omissions to steward Stan Schulz
Description: Wright, Brown, Quinby & May - patent attorneys

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