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 Perm Polt IfiledCriticalPerm Polt I
Priority to SU843768817ApriorityCriticalpatent/SU1592593A2/en
Application grantedgrantedCritical
Publication of SU1592593A2publicationCriticalpatent/SU1592593A2/en