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Priority claimed from DE19661521518external-prioritypatent/DE1521518C3/de
Application filed by Int Standard Electric CorpfiledCriticalInt Standard Electric Corp
Publication of FI48760BpublicationCriticalpatent/FI48760B/fi
Application grantedgrantedCritical
Publication of FI48760CpublicationCriticalpatent/FI48760C/fi