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All Patents in class 400/673
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
687,167	Nov. 19, 1901	A.H. Roovers, A.W. Roovers	Die press
775,354	Nov. 22, 1904	A.H. Roovers, A.W. Roovers	Die press	patternmaker
781,620	Jan. 31, 1905	A.H. Roovers, A.W. Roovers	Die press	patternmaker

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