All Patents in class 411/531


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All Patents in class 411/531
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	385,845	Jul. 10, 1888	W.S. Cobb	Tool Post Ring
	775,134	Nov. 15, 1904	K.C. Gillette	Razor
	981,315	Jan. 10, 1911	G.E. Rogers	Means for preventing frictional drag on rotating screw-heads
	1,333,707	Mar. 16, 1920	C.A. Dies	Lathe Dog and the Like
	2,151,255	Mar. 21, 1939	E.J. Witchger	Spring Nut