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All Patents in class 279/79
Patents 31 - 33 of 33
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2,476,762Jul. 19, 1949J.O. Olsen, J.N. PetreChuckscrewdriver mechanisms
2,596,594May 13, 1952J.N. PetreChuck Feature of Tools of the Detachably Connected Shank and Handle Typescrewdriver mechanisms
2,890,072Jun. 09, 1959F.A. Kaman, P.E. VegaRetainer for rotary power tools
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