FR351898A - Transmetteur téléphonique - Google Patents

Transmetteur téléphonique

Info

Publication number
FR351898A
FR351898A FR351898A FR351898DA FR351898A FR 351898 A FR351898 A FR 351898A FR 351898 A FR351898 A FR 351898A FR 351898D A FR351898D A FR 351898DA FR 351898 A FR351898 A FR 351898A
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
FR351898A
Other languages
English (en)
French (fr)
Inventor
Robert Bines
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
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of FR351898A publication Critical patent/FR351898A/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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/023—Microphones with more than one granular chamber

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR351898A 1905-02-28 Transmetteur téléphonique Expired FR351898A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE171995T

Publications (1)

Publication Number Publication Date
FR351898A true FR351898A (fr) 1905-07-28

Family

ID=5689728

Family Applications (1)

Application Number Title Priority Date Filing Date
FR351898A Expired FR351898A (fr) 1905-02-28 Transmetteur téléphonique

Country Status (2)

Country Link
DE (1) DE171995C (OSRAM)
FR (1) FR351898A (OSRAM)

Also Published As

Publication number Publication date
DE171995C (OSRAM)

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