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Publication of FR814443ApublicationCriticalpatent/FR814443A/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
FR814443D1935-12-041936-12-03Compensation de l'allure des fréquences de la pellicule employée pour l'enregistrement du son
ExpiredFR814443A
(fr)