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All Patents in class 173/205
Patents 1 - 6 of 6
Picture	Number	Date	Patentee	Title
	1,053,744	Feb. 18, 1913	J.H. Philips	Spring Hammer
	1,075,950	Oct. 14, 1913	R.R. Smith	Spring Hammer
	2,185,471	Jan. 02, 1940	A.W. Mall	Power hammer
	2,753,965	Jul. 10, 1956	F.A. Kaman	Impact tools
	3,022,838	Feb. 27, 1962	W.F. Mitchell	Portable hammer
	3,363,700	Jan. 16, 1968	F.C. Bogusch, Jr.	Rotary and hammer drill

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