Patents for O. S. Walker Co.


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Patents for O. S. Walker Co.
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,180,457	Apr. 25, 1916	O.S. Walker	Magnetic Chuck
	1,180,680	Apr. 25, 1916	O.S. Walker	Apparatus for Controlling Magnetic Chucks
	1,222,052	Apr. 10, 1917	O.S. Walker	magnetic chuck