Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SAfiledCriticalAlcatel Espana SA
Priority to ES390725ApriorityCriticalpatent/ES390725A1/en
Priority to DE19722220780prioritypatent/DE2220780A1/en
Priority to GB1962572Aprioritypatent/GB1348604A/en
Publication of ES390725A1publicationCriticalpatent/ES390725A1/en
Discriminator amplifier and double logic changer to detect the impulses obtained in the cyclic exploration of the charging pulse scanning points of any telephone system. (Machine-translation by Google Translate, not legally binding)
ES390725A1971-04-291971-04-29Discriminator amplifier and double logic changer. (Machine-translation by Google Translate, not legally binding)
ExpiredES390725A1
(en)