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Application filed by Mitsubishi Pencil CofiledCriticalMitsubishi Pencil Co
Priority to IT01905590ApriorityCriticalpatent/IT1238168B/it
Publication of IT9019055A0publicationCriticalpatent/IT9019055A0/it
Publication of IT9019055A1publicationCriticalpatent/IT9019055A1/it
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Publication of IT1238168BpublicationCriticalpatent/IT1238168B/it
IT01905590A1990-01-121990-01-12Procedimento per la preparazione di un diaframma completamente di carbonio per apparecchiature acustiche
IT1238168B
(it)