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Description: |
| The focus of the patent is the handle structure enabling "over center toggle lock" action for one jaw of an adjustable wrench. The wrench designs shown include "adjustable open end" and "adjustable jaw clamp" types.
Many U.S. examples marked only "JAPAN." One U.S. distributor (Witherby Products) included 1967 trademark registration for "FLARE WRENCH."
Reference patents cited: 1,874,944, 2,362,707, 2,445,480 and 2,704,476. The "effective date" was the date of Japanese patent application. |
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