FR905526A - Perfectionnements aux appareils électriques d'intercommunication en haut-parleur avec poste central à amplificateur unique
- Google Patents
Perfectionnements aux appareils électriques d'intercommunication en haut-parleur avec poste central à amplificateur unique
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.)
ELECTRICITE ET DE RADIO SOC GE
Original Assignee
ELECTRICITE ET DE RADIO SOC GE
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 ELECTRICITE ET DE RADIO SOC GEfiledCriticalELECTRICITE ET DE RADIO SOC GE
Application grantedgrantedCritical
Publication of FR905526ApublicationCriticalpatent/FR905526A/fr
H04M9/00—Arrangements for interconnection not involving centralised switching
H04M9/001—Two-way communication systems between a limited number of parties
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
FR905526D1944-05-261944-05-26Perfectionnements aux appareils électriques d'intercommunication en haut-parleur avec poste central à amplificateur unique
ExpiredFR905526A
(fr)