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All Patents in class 122/451.1
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,172,709	Feb. 22, 1916	F.H. Hopkins	Thermostatic Arch Flow Regulator
	1,659,558	Feb. 21, 1928	A.D. Baker	Water-Level Control for Boilers

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