FR60451E - Improvements to loudspeaker telephone systems - Google Patents

Improvements to loudspeaker telephone systems

Info

Publication number
FR60451E
FR60451E FR60451DA FR60451E FR 60451 E FR60451 E FR 60451E FR 60451D A FR60451D A FR 60451DA FR 60451 E FR60451 E FR 60451E
Authority
FR
France
Prior art keywords
telephone systems
loudspeaker telephone
loudspeaker
systems
telephone
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.)
COMM DIFFUSION DE PROCEDES BRE
Original Assignee
COMM DIFFUSION DE PROCEDES BRE
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 COMM DIFFUSION DE PROCEDES BRE filed Critical COMM DIFFUSION DE PROCEDES BRE
Application granted granted Critical
Publication of FR60451E publication Critical patent/FR60451E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
FR60451D 1949-08-05 1950-07-18 Improvements to loudspeaker telephone systems Expired FR60451E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR995771T 1949-08-05
FR60451T 1950-07-18

Publications (1)

Publication Number Publication Date
FR60451E true FR60451E (en) 1954-11-03

Family

ID=26182883

Family Applications (1)

Application Number Title Priority Date Filing Date
FR60451D Expired FR60451E (en) 1949-08-05 1950-07-18 Improvements to loudspeaker telephone systems

Country Status (2)

Country Link
CH (1) CH286688A (en)
FR (1) FR60451E (en)

Also Published As

Publication number Publication date
CH286688A (en) 1952-10-31

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