FR684630A - Improvements in sound recording and reproduction - Google Patents

Improvements in sound recording and reproduction

Info

Publication number
FR684630A
FR684630A FR684630DA FR684630A FR 684630 A FR684630 A FR 684630A FR 684630D A FR684630D A FR 684630DA FR 684630 A FR684630 A FR 684630A
Authority
FR
France
Prior art keywords
reproduction
sound recording
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)
Inventor
Archibal Fulton Pollock
David Alexander Pollock
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 FR684630A publication Critical patent/FR684630A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
FR684630D 1928-11-09 1929-11-08 Improvements in sound recording and reproduction Expired FR684630A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB684630X 1928-11-09

Publications (1)

Publication Number Publication Date
FR684630A true FR684630A (en) 1930-06-27

Family

ID=10492718

Family Applications (1)

Application Number Title Priority Date Filing Date
FR684630D Expired FR684630A (en) 1928-11-09 1929-11-08 Improvements in sound recording and reproduction

Country Status (1)

Country Link
FR (1) FR684630A (en)

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