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Application filed by Joachim Beck, Dietel Hans Juergen, Juergen Hoellrich, Guenther KathfiledCriticalJoachim Beck
Priority to DD20616578ApriorityCriticalpatent/DD137244B1/en
Publication of DD137244A1publicationCriticalpatent/DD137244A1/en
Publication of DD137244B1publicationCriticalpatent/DD137244B1/en