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 Telefonicade Espana S AfiledCriticalTelefonicade Espana S A
Priority to IN1072CA1989priorityCriticalpatent/IN173297B/en
Publication of IN173297BpublicationCriticalpatent/IN173297B/en