All Patents in class 29/889.61


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All Patents in class 29/889.61
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
2,196,497	Apr. 09, 1940	H.D. Heman	Method of Forming Tubular Members Having Thick Walled End Portions	metal forming
2,437,317	Mar. 09, 1948	D.J. Davis	Spot milling tubular blank for propeller blades	milling machines
2,561,705	Jul. 24, 1951	E. Lochman	Propeller and method of propeller manufacture