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All Patents in class 418/149
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	251,733	Jan. 03, 1882	W.C. Pooley	Rotary engine
	459,424	Sep. 15, 1891	G.A. Thomson	Rotary Engine
	685,775	Nov. 05, 1901	T.J. Lindsay	Rotary Pump or Blower
	711,239	Oct. 14, 1902	E.B. Tree	Rotary Engine
	2,492,687	Dec. 27, 1949	A.H. Dall	Hydraulic Pump

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