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 CH728468Aexternal-prioritypatent/CH507897A/de
Priority claimed from CH448069Aexternal-prioritypatent/CH539602A/de
Application filedfiledCritical
Priority to SU1487462ApriorityCriticalpatent/SU398033A3/ru
Priority to SU1486696Aprioritypatent/SU398032A3/ru
Application grantedgrantedCritical
Publication of SU403159A3publicationCriticalpatent/SU403159A3/ru