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Application filed by Directia Judeteana De Posta Si TelecomunicatiifiledCriticalDirectia Judeteana De Posta Si Telecomunicatii
Priority to RO120817ApriorityCriticalpatent/RO93932B1/ro
Publication of RO93932A2publicationCriticalpatent/RO93932A2/fr
Publication of RO93932B1publicationCriticalpatent/RO93932B1/ro
RO120817A1985-11-151985-11-15APARAT PENTRU îNREGISTRAREA IMPULSURILOR DE CONTORIZARE A DURATEI CONVORBIRILOR TELEFONICE LA DOMICILIUL ABONATULUI
RO93932B1
(ro)
Methods of detecting the use of telephone extensions in automatic private branch telephone exchanges and circuit arrangements for carrying out the methods