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 Johannes Dr Kreis, Kullmann Anton, Lehfeldt Juergen, Lier Werner, Moser Gerhard, Guenter SalewskifiledCriticalJohannes Dr Kreis
Publication of CS597581A1publicationCriticalpatent/CS597581A1/en
Publication of CS237965B1publicationCriticalpatent/CS237965B1/en