All Patents in class 91/313


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All Patents in class 91/313
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	16,358	Jan. 06, 1857	R.H. Fletcher	Operating Steam Slide Valves
	79,803	Jul. 14, 1868	J.S. Barden	Rotary Steam Engines