All Patents in class 404/133.1


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All Patents in class 404/133.1
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	429,807	Jun. 10, 1890	P.D. Dupont	Power-hammer spring
	2,856,828	Oct. 21, 1958	G.H. Brown, E.G. Lewis	Impacting machine
	2,894,435	Jul. 14, 1959	G.H. Brown	Impacting machine
	3,386,353	Jun. 04, 1968	G.S. Wells	Vibratory Compacting Machines