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EUGENE RENDU
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EUGENE RENDU
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Publication of FR524668ApublicationCriticalpatent/FR524668A/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
FR524668A1920-09-201920-09-20Système de phonographe à film, à enregistrement photogrammique
ExpiredFR524668A
(fr)