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
Priority claimed from DK120969Aexternal-prioritypatent/DK125242B/da
Application filedfiledCritical
Priority claimed from SU1411074Aexternal-prioritypatent/SU364160A3/ru
Application grantedgrantedCritical
Publication of SU384230A3publicationCriticalpatent/SU384230A3/ru