FR457392A - Transmetteur téléphonique - Google Patents

Transmetteur téléphonique

Info

Publication number
FR457392A
FR457392A FR457392A FR457392DA FR457392A FR 457392 A FR457392 A FR 457392A FR 457392 A FR457392 A FR 457392A FR 457392D A FR457392D A FR 457392DA FR 457392 A FR457392 A FR 457392A
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
FR457392A
Other languages
English (en)
French (fr)
Inventor
Andrew Plecher
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 FR457392A publication Critical patent/FR457392A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR457392A 1913-05-02 1913-05-02 Transmetteur téléphonique Expired FR457392A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191310399T 1913-05-02

Publications (1)

Publication Number Publication Date
FR457392A true FR457392A (fr) 1913-09-16

Family

ID=32644686

Family Applications (1)

Application Number Title Priority Date Filing Date
FR457392A Expired FR457392A (fr) 1913-05-02 1913-05-02 Transmetteur téléphonique

Country Status (3)

Country Link
DE (1) DE277114C (enrdf_load_stackoverflow)
FR (1) FR457392A (enrdf_load_stackoverflow)
GB (1) GB191310399A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111212509A (zh) * 2020-01-16 2020-05-29 吕明猷 读票机用滚轴静电消除机构

Also Published As

Publication number Publication date
GB191310399A (en) 1914-06-02
DE277114C (enrdf_load_stackoverflow)

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