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All Patents in class 451/89
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	914,105	Mar. 02, 1909	F.P. Boland	Sand-blast machine
	914,783	Mar. 09, 1909	F.P. Boland	Sand-blast machine
	4,084,357	Apr. 18, 1978	R.W. Moses	Valve cleaning machine

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