FR641201A - Improvements to telephone receivers - Google Patents

Improvements to telephone receivers

Info

Publication number
FR641201A
FR641201A FR641201DA FR641201A FR 641201 A FR641201 A FR 641201A FR 641201D A FR641201D A FR 641201DA FR 641201 A FR641201 A FR 641201A
Authority
FR
France
Prior art keywords
telephone receivers
receivers
telephone
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
Rene-Georges-Eugene Bury
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 FR641201A publication Critical patent/FR641201A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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)
FR641201D 1927-03-02 1927-03-02 Improvements to telephone receivers Expired FR641201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR641201T 1927-03-02

Publications (1)

Publication Number Publication Date
FR641201A true FR641201A (en) 1928-07-30

Family

ID=8997979

Family Applications (1)

Application Number Title Priority Date Filing Date
FR641201D Expired FR641201A (en) 1927-03-02 1927-03-02 Improvements to telephone receivers

Country Status (1)

Country Link
FR (1) FR641201A (en)

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