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US Patent: 4,277,990
Ratchet wrench
Patentee: Roy L. Hall (exact or similar names) - Hoffman Estates, IL USPTO Classifications: 81/63 Tool Categories: Assignees: Duro Metal Products Co. - Chicago, IL Manufacturer: Duro Metal Products Co. - Chicago, IL Witnesses: Unknown	Patent Dates: Applied: Nov. 14, 1979 Granted: Jul. 14, 1981 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Duro Metal Products Co.

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