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

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