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GERARDOT ET CIE ETS
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GERARDOT ET CIE ETS
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Application filed by GERARDOT ET CIE ETSfiledCriticalGERARDOT ET CIE ETS
Application grantedgrantedCritical
Publication of FR695162ApublicationCriticalpatent/FR695162A/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
FR695162D1929-08-141929-08-14Oscillographe utilisable pour l'enregistrement des films ou autres surfaces sonores
ExpiredFR695162A
(fr)