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CIE RADIO CINEMA
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CIE RADIO CINEMA
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Application filed by CIE RADIO CINEMAfiledCriticalCIE RADIO CINEMA
Application grantedgrantedCritical
Publication of FR731840ApublicationCriticalpatent/FR731840A/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
FR731840D1931-04-101931-04-10Procédé d'enregistrement des films sonores
ExpiredFR731840A
(fr)