FR692341A - Sound recorder - Google Patents

Sound recorder

Info

Publication number
FR692341A
FR692341A FR692341DA FR692341A FR 692341 A FR692341 A FR 692341A FR 692341D A FR692341D A FR 692341DA FR 692341 A FR692341 A FR 692341A
Authority
FR
France
Prior art keywords
sound recorder
recorder
sound
Prior art date
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
Other languages
French (fr)
Inventor
Herbert Morris Horkheimer
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 filed Critical
Application granted granted Critical
Publication of FR692341A publication Critical patent/FR692341A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • 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
FR692341D 1929-08-13 1930-03-20 Sound recorder Expired FR692341A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US692341XA 1929-08-13 1929-08-13

Publications (1)

Publication Number Publication Date
FR692341A true FR692341A (en) 1930-11-04

Family

ID=22087598

Family Applications (1)

Application Number Title Priority Date Filing Date
FR692341D Expired FR692341A (en) 1929-08-13 1930-03-20 Sound recorder

Country Status (1)

Country Link
FR (1) FR692341A (en)

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