FR580652A - - Google Patents

Info

Publication number
FR580652A
FR580652A FR580652DA FR580652A FR 580652 A FR580652 A FR 580652A FR 580652D A FR580652D A FR 580652DA FR 580652 A FR580652 A FR 580652A
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 FR580652A publication Critical patent/FR580652A/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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H04R13/02—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR580652D Expired FR580652A (cg-RX-API-DMAC7.html)

Publications (1)

Publication Number Publication Date
FR580652A true FR580652A (cg-RX-API-DMAC7.html) 1924-11-13

Family

ID=1539558

Family Applications (1)

Application Number Title Priority Date Filing Date
FR580652D Expired FR580652A (cg-RX-API-DMAC7.html)

Country Status (1)

Country Link
FR (1) FR580652A (cg-RX-API-DMAC7.html)

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