FR395477A - Appareil téléphonique avec microphone à double membrane - Google Patents

Appareil téléphonique avec microphone à double membrane

Info

Publication number
FR395477A
FR395477A FR395477DA FR395477A FR 395477 A FR395477 A FR 395477A FR 395477D A FR395477D A FR 395477DA FR 395477 A FR395477 A FR 395477A
Authority
FR
France
Prior art keywords
telephone device
double membrane
membrane microphone
microphone
double
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.)
E PICART ET LEBAS SOC
Original Assignee
E PICART ET LEBAS SOC
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 E PICART ET LEBAS SOC filed Critical E PICART ET LEBAS SOC
Application granted granted Critical
Publication of FR395477A publication Critical patent/FR395477A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR395477D 1908-10-19 1908-10-19 Appareil téléphonique avec microphone à double membrane Expired FR395477A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR395477T 1908-10-19

Publications (1)

Publication Number Publication Date
FR395477A true FR395477A (fr) 1909-03-02

Family

ID=1440648

Family Applications (1)

Application Number Title Priority Date Filing Date
FR395477D Expired FR395477A (fr) 1908-10-19 1908-10-19 Appareil téléphonique avec microphone à double membrane

Country Status (1)

Country Link
FR (1) FR395477A (fr)

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