FR641854A - Improvements to systems for recording or reproducing sound - Google Patents

Improvements to systems for recording or reproducing sound

Info

Publication number
FR641854A
FR641854A FR641854DA FR641854A FR 641854 A FR641854 A FR 641854A FR 641854D A FR641854D A FR 641854DA FR 641854 A FR641854 A FR 641854A
Authority
FR
France
Prior art keywords
recording
systems
reproducing sound
reproducing
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)
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Application granted granted Critical
Publication of FR641854A publication Critical patent/FR641854A/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
FR641854D 1927-10-05 1927-10-05 Improvements to systems for recording or reproducing sound Expired FR641854A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR641854T 1927-10-05

Publications (1)

Publication Number Publication Date
FR641854A true FR641854A (en) 1928-08-13

Family

ID=8998418

Family Applications (1)

Application Number Title Priority Date Filing Date
FR641854D Expired FR641854A (en) 1927-10-05 1927-10-05 Improvements to systems for recording or reproducing sound

Country Status (1)

Country Link
FR (1) FR641854A (en)

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