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Individual
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Individual
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Priority to DE1953H0011897priorityCriticalpatent/DE1664084U/de
Publication of DE1664084UpublicationCriticalpatent/DE1664084U/de
Schaltungsanordnung für Fernmelde-, insbesondere Fernsprechanlagen, in denen von den Teilnehmerstellen Steuerkennzeichen und Informationskennzeichen ausgesendet werden
Procédé de préparation de corps en ferrite ferromagnétique à base d'oxyde de fer (Fe2O3), d'oxyde de nickel (NiO) et d'oxyde de zinc (ZnO).