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US Patent: 4,277,990
Ratchet wrench
Patentee:
Roy L. Hall - 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 pdf tiff
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"Vintage Machinery" entry for Duro Metal Products Co.

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