All Patents in class 91/421


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All Patents in class 91/421
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	453,247	Jun. 02, 1891	S. Smith	Rotary Steam Engine
	1,884,277	Oct. 25, 1932	B. Sassen	Self Regulating Hydraulic System
	2,028,766	Jan. 28, 1936	L.F. Nenninger, H. Ernst	Uniform Feed System
	2,444,474	Jul. 06, 1948	B.R. Purvin	Fluid pressure device
	2,775,235	Dec. 25, 1956	W.F. Jessup	Booster for Template Controlled Truing Mechanism