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Priority to JP4651176ApriorityCriticalpatent/JPS52130729A/ja
Publication of JPS52130729ApublicationCriticalpatent/JPS52130729A/ja
Publication of JPS5523626B2publicationCriticalpatent/JPS5523626B2/ja
Information storage and information processing system utilizing state-designating member provided on supporting card surface which produces write-permitting or write-inhibiting signal