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.)
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by IndividualfiledCriticalIndividual
Priority to FR7608411ApriorityCriticalpatent/FR2344925A1/fr
Publication of FR2344925A1publicationCriticalpatent/FR2344925A1/fr
Application grantedgrantedCritical
Publication of FR2344925B3publicationCriticalpatent/FR2344925B3/fr
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
G11B23/288—Protecting disks from being written or overwritten
Landscapes
Engineering & Computer Science
(AREA)
Computer Security & Cryptography
(AREA)
Storage Of Web-Like Or Filamentary Materials
(AREA)
FR7608411A1976-03-181976-03-18Dispositif de mise en place de la protection ecriture sur bande magnetique
GrantedFR2344925A1
(fr)