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 filedfiledCritical
Priority to DD18750075ApriorityCriticalpatent/DD122231A2/xx
Priority to DE19752553177prioritypatent/DE2553177A1/de
Priority to CS76244Aprioritypatent/CS201596B1/cs
Priority to CH51076Aprioritypatent/CH595990A5/xx
Priority to SE7601192Aprioritypatent/SE424619B/xx
Publication of DD122231A2publicationCriticalpatent/DD122231A2/xx