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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
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 Automatic Telephone and Electric Co LtdfiledCriticalAutomatic Telephone and Electric Co Ltd
Application grantedgrantedCritical
Publication of FR835601ApublicationCriticalpatent/FR835601A/fr
H04M19/00—Current supply arrangements for telephone systems
H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like
(AREA)
FR835601D1937-04-061938-03-22Perfectionnements aux dispositifs pour étouffer ou absorber les étincelles dans les systèmes téléphoniques ou similaires
ExpiredFR835601A
(fr)