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.)
SVEN OSCAR FREDRIK SON BERGLUN
Original Assignee
SVEN OSCAR FREDRIK SON BERGLUN
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 SVEN OSCAR FREDRIK SON BERGLUNfiledCriticalSVEN OSCAR FREDRIK SON BERGLUN
Application grantedgrantedCritical
Publication of FR417730ApublicationCriticalpatent/FR417730A/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
FR417730D1909-05-171910-05-17Procédé et appareil pour photographier les sons
ExpiredFR417730A
(fr)