FR642705A - Loudspeaker device for wireless telephony - Google Patents

Loudspeaker device for wireless telephony

Info

Publication number
FR642705A
FR642705A FR642705DA FR642705A FR 642705 A FR642705 A FR 642705A FR 642705D A FR642705D A FR 642705DA FR 642705 A FR642705 A FR 642705A
Authority
FR
France
Prior art keywords
loudspeaker device
wireless telephony
telephony
loudspeaker
wireless
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.)
Societe des Etablissements Edouard Belin SA
Original Assignee
Societe des Etablissements Edouard Belin SA
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 Societe des Etablissements Edouard Belin SA filed Critical Societe des Etablissements Edouard Belin SA
Application granted granted Critical
Publication of FR642705A publication Critical patent/FR642705A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR642705D 1927-03-24 1927-03-24 Loudspeaker device for wireless telephony Expired FR642705A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR642705T 1927-03-24

Publications (1)

Publication Number Publication Date
FR642705A true FR642705A (en) 1928-09-03

Family

ID=8998975

Family Applications (1)

Application Number Title Priority Date Filing Date
FR642705D Expired FR642705A (en) 1927-03-24 1927-03-24 Loudspeaker device for wireless telephony

Country Status (2)

Country Link
BE (1) BE349183A (en)
FR (1) FR642705A (en)

Also Published As

Publication number Publication date
BE349183A (en)

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