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.)
SELENOPHON LICHT und TONBILD G
Original Assignee
SELENOPHON LICHT und TONBILD G
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SELENOPHON LICHT und TONBILD GfiledCriticalSELENOPHON LICHT und TONBILD G
Application grantedgrantedCritical
Publication of FR683846ApublicationCriticalpatent/FR683846A/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
FR683846D1928-10-251929-10-23Film sonore et procédé et appareil pour son enregistrement
ExpiredFR683846A
(fr)