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 filed by Do Pk T InstfiledCriticalDo Pk T Inst
Priority to SU762401828ApriorityCriticalpatent/SU648506A1/en
Application grantedgrantedCritical
Publication of SU648506A1publicationCriticalpatent/SU648506A1/en