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Application filed by Bang & Olufsen AsfiledCriticalBang & Olufsen As
Priority to DK56348ApriorityCriticalpatent/DK74209C/da
Application grantedgrantedCritical
Publication of DK74209CpublicationCriticalpatent/DK74209C/da
DK56348A1948-02-231948-02-23Koblingsorgan til overføring af lavfrekvente strømevariationer i en telefon til et nedskrivnings- eller gengiveapparat.
DK74209C
(da)