All Patents in class 73/1.68


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All Patents in class 73/1.68
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	476,512	Jun. 07, 1892	C.B. Bosworth	Device for testing pressure-gauges
	748,010	Dec. 29, 1903	S.G. Reed	Pressure Weighing Machine