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KRAUSS SOC D Ets
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KRAUSS SOC D Ets
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Publication of FR700984ApublicationCriticalpatent/FR700984A/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
FR700984D1930-08-221930-08-22Dispositif optique pour la reproduction des sons
ExpiredFR700984A
(fr)