All Patents in class 74/831


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All Patents in class 74/831
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	43,471	Jul. 12, 1864	H. Blandy, F.J. Blandy	Improvement in Valve-Gear for Steam-Engines
	307,128	Oct. 28, 1884	L.C. Lugmayr	Valve Gear for Engines
	618,433	Jan. 31, 1899	G. Palm	Reversing Gear