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Patents for H. D. Williams
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	272,940	Feb. 27, 1883	B.F. Bergh	Gear-wheel
	298,635	May 13, 1884	F. Thompson	Damper-regulator
	331,246	Nov. 24, 1885	J.W. Kenyon	Steam-trap

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