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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Universum Film AG
Original Assignee
Universum Film AG
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Filing date
Publication date
Application filed by Universum Film AGfiledCriticalUniversum Film AG
Application grantedgrantedCritical
Publication of FR904248ApublicationCriticalpatent/FR904248A/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
FR904248D1944-05-121944-05-12Procédé d'enregistrement du son, notamment sur les films sonores
ExpiredFR904248A
(fr)