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 & Tonbildges
Original Assignee
Selenophon Licht & Tonbildges
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Filing date
Publication date
Application filed by Selenophon Licht & TonbildgesfiledCriticalSelenophon Licht & Tonbildges
Application grantedgrantedCritical
Publication of FR701500ApublicationCriticalpatent/FR701500A/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
FR701500D1929-09-031930-09-01
Phonogram and its manufacturing process
ExpiredFR701500A
(en)