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.)
Telephon Apparat Fabrik E Zwietusch and Co
Original Assignee
Telephon Apparat Fabrik E Zwietusch and Co
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Filing date
Publication date
Application filed by Telephon Apparat Fabrik E Zwietusch and CofiledCriticalTelephon Apparat Fabrik E Zwietusch and Co
Application grantedgrantedCritical
Publication of FR651967ApublicationCriticalpatent/FR651967A/fr
H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
FR651967D1928-03-301928-03-30Disposition de connexion pour sous-centrales dans les installations téléphoniques à fonctionnement par sélecteurs
ExpiredFR651967A
(fr)