FR561116A - Perfectionnements apportés à la téléphonie - Google Patents

Perfectionnements apportés à la téléphonie

Info

Publication number
FR561116A
FR561116A FR561116DA FR561116A FR 561116 A FR561116 A FR 561116A FR 561116D A FR561116D A FR 561116DA FR 561116 A FR561116 A FR 561116A
Authority
FR
France
Prior art keywords
telephony
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR561116A publication Critical patent/FR561116A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Lasers (AREA)
FR561116D 1921-05-20 1922-05-15 Perfectionnements apportés à la téléphonie Expired FR561116A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US471228A US1527649A (en) 1921-05-20 1921-05-20 Telephony

Publications (1)

Publication Number Publication Date
FR561116A true FR561116A (fr) 1923-10-16

Family

ID=23870779

Family Applications (1)

Application Number Title Priority Date Filing Date
FR561116D Expired FR561116A (fr) 1921-05-20 1922-05-15 Perfectionnements apportés à la téléphonie

Country Status (3)

Country Link
US (1) US1527649A (fr)
FR (1) FR561116A (fr)
GB (1) GB180338A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239827A (en) * 1960-01-12 1966-03-08 Rosemount Eng Co Ltd High precision pressure standard
US9344811B2 (en) * 2012-10-31 2016-05-17 Vocalzoom Systems Ltd. System and method for detection of speech related acoustic signals by using a laser microphone

Also Published As

Publication number Publication date
US1527649A (en) 1925-02-24
GB180338A (en) 1923-08-16

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