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Patents for Harry Samuel Nicholson
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,080,507	Dec. 02, 1913	J.B. Armstrong	Trap-Valve Mechanism
	1,302,833	May 06, 1919	W.C. Beiswinger, H.S. Nicholson	Steam-Trap

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