Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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NAKKEN PATENTS CORP
Original Assignee
NAKKEN PATENTS CORP
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Filing date
Publication date
Application filed by NAKKEN PATENTS CORPfiledCriticalNAKKEN PATENTS CORP
Application grantedgrantedCritical
Publication of FR697800ApublicationCriticalpatent/FR697800A/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
FR697800D1930-06-231930-06-23Système éclairant pour l'enregistrement et la reproduction photographique des sons
ExpiredFR697800A
(fr)