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Priority to PL29655792ApriorityCriticalpatent/PL168819B1/en
Publication of PL296557A2publicationCriticalpatent/PL296557A2/en
Publication of PL168819B1publicationCriticalpatent/PL168819B1/en
PL29655792A1992-11-101992-11-10Circuit arrangement of a processor based digital telephone set in particular that with loudspeaking feature
PL168819B1
(en)