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Application filed by Siegfried Ziegenbalg, Gerhard Fischer, Wolfgang Dressler, Reinhard Hochstein, Jochen Ludwig, Walter LerezfiledCriticalSiegfried Ziegenbalg
Priority to DD20702978ApriorityCriticalpatent/DD137574A1/de
Publication of DD137574A1publicationCriticalpatent/DD137574A1/de