FR323301A - Un système pour utiliser deux conducteurs et la terre pour transmettre un certain nombre de communications électriques différentes
- Google Patents
Un système pour utiliser deux conducteurs et la terre pour transmettre un certain nombre de communications électriques différentes
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.)
NEW PHONOPORE TELEPHONE Co Ltd Ste
Original Assignee
NEW PHONOPORE TELEPHONE Co Ltd Ste
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 NEW PHONOPORE TELEPHONE Co Ltd StefiledCriticalNEW PHONOPORE TELEPHONE Co Ltd Ste
Application grantedgrantedCritical
Publication of FR323301ApublicationCriticalpatent/FR323301A/fr
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/26—Devices for calling a subscriber
H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of DC signals of alternating polarity, coded pulses or impedance dialling
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
FR323301D1902-07-291902-07-29Un système pour utiliser deux conducteurs et la terre pour transmettre un certain nombre de communications électriques différentes
ExpiredFR323301A
(fr)
Synchronisation de messages électroniques par le biais d'un canal de messagerie sécurisé transféré parmi un système de divers dispositifs informatiques mis en réseau
Supresión de la inducción en las redes telefónicas por medio de un solo hilo de vuelta para un número cualquiera de conductores y sin placas de tierra.