FR848213A - Improvements to telecommunications systems - Google Patents

Improvements to telecommunications systems

Info

Publication number
FR848213A
FR848213A FR848213DA FR848213A FR 848213 A FR848213 A FR 848213A FR 848213D A FR848213D A FR 848213DA FR 848213 A FR848213 A FR 848213A
Authority
FR
France
Prior art keywords
telecommunications systems
telecommunications
systems
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
French (fr)
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT 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 Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Application granted granted Critical
Publication of FR848213A publication Critical patent/FR848213A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
FR848213D 1937-12-30 1938-12-30 Improvements to telecommunications systems Expired FR848213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US182442A US2153040A (en) 1937-12-30 1937-12-30 Signal transmission system

Publications (1)

Publication Number Publication Date
FR848213A true FR848213A (en) 1939-10-25

Family

ID=22668507

Family Applications (1)

Application Number Title Priority Date Filing Date
FR848213D Expired FR848213A (en) 1937-12-30 1938-12-30 Improvements to telecommunications systems

Country Status (2)

Country Link
US (1) US2153040A (en)
FR (1) FR848213A (en)

Also Published As

Publication number Publication date
US2153040A (en) 1939-04-04

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