All Patents in class 415/217.1


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All Patents in class 415/217.1
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	878,256	Feb. 04, 1908	W.H. Thorne	Centrifugal Pump
	940,257	Nov. 16, 1909	C.V. Kerr	Centrifugal Pump
	2,814,540	Nov. 26, 1957	H.I. Southerwick	Piston Packing
	2,828,531	Apr. 01, 1958	C.J. Bath	Method of Making a Helicopter Blade