FR676675A - Improvement in telephone receivers - Google Patents

Improvement in telephone receivers

Info

Publication number
FR676675A
FR676675A FR676675DA FR676675A FR 676675 A FR676675 A FR 676675A FR 676675D A FR676675D A FR 676675DA FR 676675 A FR676675 A FR 676675A
Authority
FR
France
Prior art keywords
improvement
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)
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.)
BERGER ET DUQUESNE T S F ETS
Original Assignee
BERGER ET DUQUESNE T S F ETS
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 BERGER ET DUQUESNE T S F ETS filed Critical BERGER ET DUQUESNE T S F ETS
Application granted granted Critical
Publication of FR676675A publication Critical patent/FR676675A/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
    • H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR676675D 1928-09-18 1928-09-18 Improvement in telephone receivers Expired FR676675A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR676675T 1928-09-18

Publications (1)

Publication Number Publication Date
FR676675A true FR676675A (en) 1930-02-26

Family

ID=9020020

Family Applications (1)

Application Number Title Priority Date Filing Date
FR676675D Expired FR676675A (en) 1928-09-18 1928-09-18 Improvement in telephone receivers

Country Status (1)

Country Link
FR (1) FR676675A (en)

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