Dia_259-114

DE: Patentschrift: Dr. John H. Smith und Dr. Waldemar Merckens, Doppelschichtiger Bildträger, 30.01.1907, Patent Nr. 40060
EN: Patent specification: Dr. John H. Smith and Dr. Waldemar Merckens, Double-layer image carrier, Jan. 30, 1907, Patent No. 40060

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