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Publication of FR787492ApublicationCriticalpatent/FR787492A/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
FR787492D1934-03-211935-03-18Dispositif pour la reproduction de pistes sonores photographiques disposées côte-à-côte sur un film
ExpiredFR787492A
(fr)
Dispositif pour l'enregistrement et la reproduction continus de pistes sonores photographiques parallèles aux bords d'un film en forme de bande sans fin