FR779504A - écouteur téléphonique - Google Patents

écouteur téléphonique

Info

Publication number
FR779504A
FR779504A FR779504DA FR779504A FR 779504 A FR779504 A FR 779504A FR 779504D A FR779504D A FR 779504DA FR 779504 A FR779504 A FR 779504A
Authority
FR
France
Prior art keywords
phone earpiece
earpiece
phone
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
English (en)
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.)
LAILLER ETS
Original Assignee
LAILLER 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 LAILLER ETS filed Critical LAILLER ETS
Application granted granted Critical
Publication of FR779504A publication Critical patent/FR779504A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR779504D 1934-10-08 1934-10-08 écouteur téléphonique Expired FR779504A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR779504T 1934-10-08

Publications (1)

Publication Number Publication Date
FR779504A true FR779504A (fr) 1935-04-08

Family

ID=9202793

Family Applications (1)

Application Number Title Priority Date Filing Date
FR779504D Expired FR779504A (fr) 1934-10-08 1934-10-08 écouteur téléphonique

Country Status (1)

Country Link
FR (1) FR779504A (fr)

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