Original Patent - Dr. H. Beckmann in Witten a. d. Ruhr , 1899 , Herstellung von Bleisuperoxyd !!!

Published by Patentinhaber: Dr. Hermann Beckmann in Witten a. d.RuhrPatent: Verfahren zur Herstellung einer Schicht vonBleisuperoxyd auf SammlerelektrodenPatentiert am: 20.05.1899K-28
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