FR724954A - Improvements to devices intended for sound recording - Google Patents

Improvements to devices intended for sound recording

Info

Publication number
FR724954A
FR724954A FR724954DA FR724954A FR 724954 A FR724954 A FR 724954A FR 724954D A FR724954D A FR 724954DA FR 724954 A FR724954 A FR 724954A
Authority
FR
France
Prior art keywords
sound recording
devices intended
intended
devices
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 FR724954A publication Critical patent/FR724954A/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
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/03—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by deforming with non-mechanical means, e.g. laser, beam of particles

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR724954D 1930-10-24 1931-10-22 Improvements to devices intended for sound recording Expired FR724954A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US724954XA 1930-10-24 1930-10-24

Publications (1)

Publication Number Publication Date
FR724954A true FR724954A (en) 1932-05-06

Family

ID=22107956

Family Applications (1)

Application Number Title Priority Date Filing Date
FR724954D Expired FR724954A (en) 1930-10-24 1931-10-22 Improvements to devices intended for sound recording

Country Status (1)

Country Link
FR (1) FR724954A (en)

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