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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kodak Pathe SA
Original Assignee
Kodak Pathe SA
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Filing date
Publication date
Application filed by Kodak Pathe SAfiledCriticalKodak Pathe SA
Application grantedgrantedCritical
Publication of FR897514ApublicationCriticalpatent/FR897514A/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
FR897514D1940-04-091943-08-25Dispositif pour l'enregistrement des sons à densité variable
ExpiredFR897514A
(fr)