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Application filed by Ericsson Telefon Ab L MfiledCriticalEricsson Telefon Ab L M
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Publication of DK83907CpublicationCriticalpatent/DK83907C/da
DK18353A1952-01-211953-01-20Indretning til at signalere en unormal funktionsmåde ved ét eller flere apparater inden for en apparatgruppe.
DK83907C
(da)