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 Wasserversorgung AbwassefiledCriticalWasserversorgung Abwasse
Priority to DD31146987ApriorityCriticalpatent/DD268231B3/en
Publication of DD268231A1publicationCriticalpatent/DD268231A1/en
Publication of DD268231B3publicationCriticalpatent/DD268231B3/en