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Patents for Barthold de Mattia
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	CA-246,554	Feb. 03, 1925	B. de Mattia	Core for tires
	CA-246,555	Feb. 03, 1925	B. de Mattia	Core for tires
	CA-255,729	Nov. 24, 1925	B. de Mattia	Tire building core
	CA-272,661	Jul. 26, 1927	B. de Mattia	Method of making pneumatic tires
	CA-275,075	Nov. 01, 1927	B. de Mattia	Collapsible core

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