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All Patents in class 220/663
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	143,574	Oct. 14, 1873	J.C. Hoadley	Dead-Lights for Steam-Boilers
	498,299	May 30, 1893	W.L. Mullins, T.W. Petway	Coffee Roaster
	1,129,988	Mar. 02, 1915	E.A. Kelsey	Sight Glass
	1,164,694	Dec. 21, 1915	R. Wood	Sight Glass
	2,604,229	Jul. 22, 1952	E. Schwarz	Closure Seal for Vacuum Vessels

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