FR23320E - Transmetteur téléphonique - Google Patents

Transmetteur téléphonique

Info

Publication number
FR23320E
FR23320E FR23320A FR23320DA FR23320E FR 23320 E FR23320 E FR 23320E FR 23320 A FR23320 A FR 23320A FR 23320D A FR23320D A FR 23320DA FR 23320 E FR23320 E FR 23320E
Authority
FR
France
Prior art keywords
telephone transmitter
telephone
transmitter
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
FR23320A
Other languages
English (en)
Inventor
Charles Bouvet
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.)
CHARLES BOUVET
Original Assignee
CHARLES BOUVET
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 CHARLES BOUVET filed Critical CHARLES BOUVET
Application granted granted Critical
Publication of FR23320E publication Critical patent/FR23320E/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
    • H04R1/12—Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection
    • 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
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
FR23320A 1917-08-03 1917-08-03 Transmetteur téléphonique Expired FR23320E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR23320T 1917-08-03

Publications (1)

Publication Number Publication Date
FR23320E true FR23320E (fr) 1921-11-02

Family

ID=8662074

Family Applications (2)

Application Number Title Priority Date Filing Date
FR523793A Expired FR523793A (fr) 1917-08-03 1915-10-04 Transmetteur téléphonique
FR23320A Expired FR23320E (fr) 1917-08-03 1917-08-03 Transmetteur téléphonique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR523793A Expired FR523793A (fr) 1917-08-03 1915-10-04 Transmetteur téléphonique

Country Status (1)

Country Link
FR (2) FR523793A (fr)

Also Published As

Publication number Publication date
FR523793A (fr) 1921-08-25

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