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Application filed by Ver Telephon Czeija Nissl & CofiledCriticalVer Telephon Czeija Nissl & Co
Application grantedgrantedCritical
Publication of AT129580BpublicationCriticalpatent/AT129580B/de
AT129580D1929-01-311929-12-04Schaltungsanordnung zur Herstellung von Verbindungen in selbsttätigen oder halbselbsttätigen Fernsprechanlagen.
AT129580B
(de)