FR668395A - Perfectionnements aux amplificateurs de sons - Google Patents

Perfectionnements aux amplificateurs de sons

Info

Publication number
FR668395A
FR668395A FR668395DA FR668395A FR 668395 A FR668395 A FR 668395A FR 668395D A FR668395D A FR 668395DA FR 668395 A FR668395 A FR 668395A
Authority
FR
France
Prior art keywords
sound amplifiers
amplifiers
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
English (en)
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.)
COLUMBIA GRAPHOPHONE Co
Original Assignee
COLUMBIA GRAPHOPHONE Co
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 COLUMBIA GRAPHOPHONE Co filed Critical COLUMBIA GRAPHOPHONE Co
Application granted granted Critical
Publication of FR668395A publication Critical patent/FR668395A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
FR668395D 1928-02-06 1929-01-19 Perfectionnements aux amplificateurs de sons Expired FR668395A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB668395X 1928-02-06

Publications (1)

Publication Number Publication Date
FR668395A true FR668395A (fr) 1929-10-31

Family

ID=10491521

Family Applications (1)

Application Number Title Priority Date Filing Date
FR668395D Expired FR668395A (fr) 1928-02-06 1929-01-19 Perfectionnements aux amplificateurs de sons

Country Status (1)

Country Link
FR (1) FR668395A (fr)

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