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Publication date
Application filed by Telefonbau & Normalzeit GmbhfiledCriticalTelefonbau & Normalzeit Gmbh
Publication of CH212072ApublicationCriticalpatent/CH212072A/de
H04Q3/0016—Arrangements providing connection between exchanges
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Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
CH212072D1938-07-281939-07-25Schaltungsanordnung für Fernsprechanlagen mit mehreren Vermittlungsstellen und Stromstosserneuerungseinrichtungen.
CH212072A
(de)