Tongue-and-groove pliers (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Tongue-and-groove pliers" in English language version.

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US 2592927, Manning, Howard H., "Adjustable pliers", published 1952-04-15, assigned to Champion De Arment Tool Co.
US 4890519, le Duc, Don, "Adjustable pliers", published 1990-01-02
CA 64246A, Graham Higgins, Vernon, "Tongs", published 1899-10-09, assigned to Vernon Graham Higgins
US 1950362, Manning, Howard H., "Tool", published 1934-03-06, assigned to Champion De Arment Tool Co.

"Common Maintenance Tools and Their Use: Water-Pump Pliers and Groove-Joint Pliers". Aviation Boatswains Mate E - Aviation theories and other practices. Retrieved 2010-03-29.