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Application filed by Mitsubishi Pencil CofiledCriticalMitsubishi Pencil Co
Priority to IT47784/88ApriorityCriticalpatent/IT1219885B/en
Publication of IT8847784A0publicationCriticalpatent/IT8847784A0/en
Application grantedgrantedCritical
Publication of IT1219885BpublicationCriticalpatent/IT1219885B/en