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All Patents in class 73/729.1
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	29,646	Aug. 14, 1860	A.J. Allen	Steam Pressure Gage
	1,044,678	Nov. 19, 1912	C.J. Manning	Recording Low Pressure Gage
	1,349,884	Aug. 17, 1920	F.H. Hopkins	Diaphragm Gage
	1,997,917	Apr. 16, 1935	A. Von Wangenheim, P.S. Russel	Gauge

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