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 HUTA001290priorityCriticalpatent/HU169404B/hu
Priority to DD18404775Aprioritypatent/DD117126A1/xx
Priority to SU752103830Aprioritypatent/SU691113A3/ru
Publication of HU169404BpublicationCriticalpatent/HU169404B/hu
