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All Patents in class 72/452.7
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	575,790	Jan. 26, 1897	C.D. Rice	Forging Machine
	1,053,744	Feb. 18, 1913	J.H. Philips	Spring Hammer
	1,075,950	Oct. 14, 1913	R.R. Smith	Spring Hammer
	1,297,940	Mar. 18, 1919	A. Vincent	Trip Hammer
	1,798,082	Mar. 24, 1931	E.B. Grutzbach	Hammer attachment for electric drills

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