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Patents for Martin H. Preis
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	D155,539	Oct. 11, 1949	M.H. Preis, J.A. Hoffman	Design for an engraving machine
	2,524,636	Oct. 03, 1950	M.H. Preis, J.A. Hofmann	Cutter for pantograph engraving machines

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