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B K D V Ltd
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B K D V Ltd
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Application filed by B K D V LtdfiledCriticalB K D V Ltd
Application grantedgrantedCritical
Publication of FR1113148ApublicationCriticalpatent/FR1113148A/en
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
FR1113148D1953-10-061954-10-06
Improvements to sound recording and reproduction systems
ExpiredFR1113148A
(en)