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Publication of FR908301ApublicationCriticalpatent/FR908301A/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
FR908301D1944-12-181944-12-18Perfectionnements à l'enregistrement photographique des sons
ExpiredFR908301A
(fr)