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All Patents in class 277/407
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,213,167	Jan. 23, 1917	A.M. Drake	Magnetic chuck and casing
	2,881,015	Apr. 07, 1959	E.C. Wahl	Shaft Seal Means and Method
	3,138,390	Jun. 23, 1964	H. Jensen	Rotary Seal With Annular Bead

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