FR563663A - - Google Patents

Info

Publication number
FR563663A
FR563663A FR563663DA FR563663A FR 563663 A FR563663 A FR 563663A FR 563663D A FR563663D A FR 563663DA FR 563663 A FR563663 A FR 563663A
Authority
FR
France
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)
Publication date
Application granted granted Critical
Publication of FR563663A publication Critical patent/FR563663A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR563663D Expired FR563663A (cg-RX-API-DMAC10.html)

Publications (1)

Publication Number Publication Date
FR563663A true FR563663A (cg-RX-API-DMAC10.html) 1923-12-11

Family

ID=1538953

Family Applications (1)

Application Number Title Priority Date Filing Date
FR563663D Expired FR563663A (cg-RX-API-DMAC10.html)

Country Status (1)

Country Link
FR (1) FR563663A (cg-RX-API-DMAC10.html)

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