FR26568E - Dispositif perfectionné destiné à empêcher dans les tableaux téléphoniques la mise en communication irrégulière de deux postes
- Google Patents
Dispositif perfectionné destiné à empêcher dans les tableaux téléphoniques la mise en communication irrégulière de deux postes
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.)
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Societe des Telephones Ericsson SA
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Societe des Telephones Ericsson SA
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Application filed by Societe des Telephones Ericsson SAfiledCriticalSociete des Telephones Ericsson SA
Application grantedgrantedCritical
Publication of FR26568EpublicationCriticalpatent/FR26568E/fr
H04M3/22—Arrangements for supervision, monitoring or testing
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Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
FR26568D1922-04-031922-04-03Dispositif perfectionné destiné à empêcher dans les tableaux téléphoniques la mise en communication irrégulière de deux postes
ExpiredFR26568E
(fr)