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Publication of DK97236CpublicationCriticalpatent/DK97236C/da
DK353759A1958-10-071959-10-03Lager til registrering af den ledige eller optagne tilstand for led i koblingsnetværk i telekommunikationscentraler.
DK97236C
(da)
Schaltungsanordnung zur Feststellung des Frei- bzw. Besetztzustandes von Zwischenleitungen eines Koppelfeldes in Fernmelde-, insbesondere Fernsprechanlagen