FR836864A - Improvements to sound recording systems - Google Patents

Improvements to sound recording systems

Info

Publication number
FR836864A
FR836864A FR836864DA FR836864A FR 836864 A FR836864 A FR 836864A FR 836864D A FR836864D A FR 836864DA FR 836864 A FR836864 A FR 836864A
Authority
FR
France
Prior art keywords
sound recording
recording systems
systems
sound
recording
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)
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Application granted granted Critical
Publication of FR836864A publication Critical patent/FR836864A/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
FR836864D 1937-04-20 1938-04-20 Improvements to sound recording systems Expired FR836864A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US836864XA 1937-04-20 1937-04-20

Publications (1)

Publication Number Publication Date
FR836864A true FR836864A (en) 1939-01-27

Family

ID=22180010

Family Applications (1)

Application Number Title Priority Date Filing Date
FR836864D Expired FR836864A (en) 1937-04-20 1938-04-20 Improvements to sound recording systems

Country Status (1)

Country Link
FR (1) FR836864A (en)

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