All Patents in class 91/224


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All Patents in class 91/224
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
181,386	Aug. 22, 1876	E.S. Winchester	Rock Drilling Machine	stone boring and drilling machines
338,408	Mar. 23, 1886	G. Haydn	Motor
607,630	Jul. 19, 1898	O.A. Ringbom	Steam Engine	steam engine valves