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All Patents in class 122/76
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	344,071	Jun. 22, 1886	R.W. Aitken	Steam Boiler
	389,250	Sep. 11, 1888	W.N. Rumely	Steam Boiler
	440,284	Nov. 11, 1890	C. Sprague	Boiler
	616,380	Dec. 20, 1898	C.G. Wernicke	Boiler

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