FR380185A - Téléphone haut parleur - Google Patents

Téléphone haut parleur

Info

Publication number
FR380185A
FR380185A FR380185A FR380185DA FR380185A FR 380185 A FR380185 A FR 380185A FR 380185 A FR380185 A FR 380185A FR 380185D A FR380185D A FR 380185DA FR 380185 A FR380185 A FR 380185A
Authority
FR
France
Prior art keywords
speaker phone
speaker
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
FR380185A
Other languages
English (en)
Inventor
Domenico Marzi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR380185A publication Critical patent/FR380185A/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
    • 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)
FR380185A 1907-02-01 1907-07-24 Téléphone haut parleur Expired FR380185A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT380185X 1907-02-01

Publications (1)

Publication Number Publication Date
FR380185A true FR380185A (fr) 1907-11-30

Family

ID=1426421

Family Applications (1)

Application Number Title Priority Date Filing Date
FR380185A Expired FR380185A (fr) 1907-02-01 1907-07-24 Téléphone haut parleur

Country Status (1)

Country Link
FR (1) FR380185A (fr)

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