All Patents in class 175/404


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All Patents in class 175/404
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
111,167	Jan. 24, 1871	O.O. Witherell, A. Bauman	Improvement in hollow augers	hollow bits
1,807,625	Jun. 02, 1931	H.J. Hjorth	Valve Wrench	wrenches