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Application filed by Juergen Witt, Werner Gutschow, Detlef MulertfiledCriticalJuergen Witt
Priority to DD23572881ApriorityCriticalpatent/DD208913A1/de
Priority to DK530382Aprioritypatent/DK530382A/da
Publication of DD208913A1publicationCriticalpatent/DD208913A1/de