All Patents in class 123/56.2


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All Patents in class 123/56.2
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	127,747	Jun. 11, 1872	J. Donnelly	Improvement in Apparatus for Operating Steam-Engine
	174,590	Mar. 07, 1876	H. Tesseyman	Valve Gear For Direct-Acting Engines