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All Patents in class 340/392.1
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	5,164	Jun. 19, 1847	U.C. Hill, C.F. Hill	"Hilleno"
	1,312,610	Aug. 12, 1919	P.E. Chapman, R.H. Robinson	Variably pitched and actuated bell

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