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SOPAREL SOC
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SOPAREL SOC
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Application filed by SOPAREL SOCfiledCriticalSOPAREL SOC
Application grantedgrantedCritical
Publication of FR997457ApublicationCriticalpatent/FR997457A/fr
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
FR997457D1949-09-131949-09-13Perfectionnement aux machines parlantes
ExpiredFR997457A
(fr)