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 SU1743667ApriorityCriticalpatent/SU416870A1/ru
Application grantedgrantedCritical
Publication of SU416870A1publicationCriticalpatent/SU416870A1/ru
Improvements in or relating to ferroelectric crystal matrices and calling subscriber's telephone station identification apparatus in which such matrices are used