Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Horst Gerlach, Herbert SchidafiledCriticalHorst Gerlach
Priority to DD20796278ApriorityCriticalpatent/DD138841A1/en
Publication of DD138841A1publicationCriticalpatent/DD138841A1/en