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
Standard Electrica 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 SA, Standard Electrica SAfiledCriticalAlcatel Espana SA
Priority to ES212941ApriorityCriticalpatent/ES212941A1/en
Publication of ES212941A1publicationCriticalpatent/ES212941A1/en
Transmission Systems Not Characterized By The Medium Used For Transmission
(AREA)
Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body
(AREA)
Earth Drilling
(AREA)
Abstract
Communication system to transmit within a relatively narrow bandwidth signals that have a band frequency band comprising a supply of broad band signals means for producing their narrow frequency bands using parts of said broad band and means for transposing their bands to adjacent positions in the frequency spectrum to form a signal having a frequency band narrow and means for transmitting said signal having a narrow frequency band. (Machine-translation by Google Translate, not legally binding)
ES212941A1953-12-291953-12-29A communication system (Machine-translation by Google Translate, not legally binding)
ExpiredES212941A1
(en)