Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP40877ApriorityCriticalpatent/JPS5385405A/en
Publication of JPS5385405ApublicationCriticalpatent/JPS5385405A/en
PURPOSE: To record the spectral curve on the magnetic card for the purpose of improving the retrieval efficiency, by forming a sensitive layer on the magnetic card.
COPYRIGHT: (C)1978,JPO&Japio
JP40877A1977-01-071977-01-07Magnetic card for data retrieval
PendingJPS5385405A
(en)