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.)
Expired
Application number
GB596022A
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Individual
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Individual
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Publication date
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Publication of GB178805ApublicationCriticalpatent/GB178805A/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
GB596022A1921-04-181922-02-28Process and means for the production of photographic records of sound waves
ExpiredGB178805A
(en)