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 DD19087076ApriorityCriticalpatent/DD124278A1/xx
Priority to GB4170176Aprioritypatent/GB1556740A/en
Priority to SE7612844Aprioritypatent/SE416780B/xx
Publication of DD124278A1publicationCriticalpatent/DD124278A1/xx