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Patents for W. H. Nicholson & Co., Inc.
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	CA-151,489	Nov. 04, 1913	J.B. Armstrong	Trap Valve
	1,080,507	Dec. 02, 1913	J.B. Armstrong	Trap-Valve Mechanism

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