All Patents in class 411/404


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All Patents in class 411/404
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
2,046,343	Jul. 07, 1936	H.F. Phillips	Screw
2,046,837	Jul. 07, 1936	H.F. Phillips	Means for Uniting a Screw with a Driver
2,046,839	Jul. 07, 1936	T.M. Fitzpatrick, H.F. Phillips	Screw