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US Patent: 2,211,507
Self-Adjusting Pipe Wrench
Patentee: Ralph E. Lilleberg (exact or similar names) - Chicago, IL USPTO Classifications: 81/186, 81/99 Tool Categories: wrenches : wrench adjustment types : self-adjust wrenches wrenches : pipe wrenches Assignees: Nye Tool & Machine Works - Chicago, IL Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Nov. 23, 1938 Granted: Aug. 13, 1940 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Stan Schulz
Description: Clinton, Wiles, Davies, Hersohl & Dawson - patent attorneys This patent was cited as prior art in patent no. 2,555,395.

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