FR664835A - Perfectionnement aux phonographes - Google Patents

Perfectionnement aux phonographes

Info

Publication number
FR664835A
FR664835A FR664835DA FR664835A FR 664835 A FR664835 A FR 664835A FR 664835D A FR664835D A FR 664835DA FR 664835 A FR664835 A FR 664835A
Authority
FR
France
Prior art keywords
phonographs
improvement
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)
Inventor
Marcel-Jean Quero
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 FR664835A publication Critical patent/FR664835A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR664835D 1928-11-29 1928-11-29 Perfectionnement aux phonographes Expired FR664835A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR664835T 1928-11-29

Publications (1)

Publication Number Publication Date
FR664835A true FR664835A (fr) 1929-09-09

Family

ID=9012909

Family Applications (1)

Application Number Title Priority Date Filing Date
FR664835D Expired FR664835A (fr) 1928-11-29 1928-11-29 Perfectionnement aux phonographes

Country Status (1)

Country Link
FR (1) FR664835A (fr)

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