FR995771A - Improvements to loudspeaker telephone systems - Google Patents

Improvements to loudspeaker telephone systems

Info

Publication number
FR995771A
FR995771A FR995771DA FR995771A FR 995771 A FR995771 A FR 995771A FR 995771D A FR995771D A FR 995771DA FR 995771 A FR995771 A FR 995771A
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 FR995771A publication Critical patent/FR995771A/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)
FR995771D 1949-08-05 1949-08-05 Improvements to loudspeaker telephone systems Expired FR995771A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR995771T 1949-08-05

Publications (1)

Publication Number Publication Date
FR995771A true FR995771A (en) 1951-12-07

Family

ID=9557443

Family Applications (1)

Application Number Title Priority Date Filing Date
FR995771D Expired FR995771A (en) 1949-08-05 1949-08-05 Improvements to loudspeaker telephone systems

Country Status (1)

Country Link
FR (1) FR995771A (en)

Similar Documents

Publication Publication Date Title
FR1006508A (en) Improvements to loudspeaker telephone systems
FR987123A (en) Loudspeaker enhancements
CH283262A (en) Loudspeaker bilateral telephone system.
FR1023959A (en) Improvements to automatic telephone exchanges
FR1032378A (en) Improvements to telephone headsets
FR1005064A (en) Improvements to single-way loudspeaker telephone installations
FR995771A (en) Improvements to loudspeaker telephone systems
FR60451E (en) Improvements to loudspeaker telephone systems
FR1048559A (en) Improvements to loudspeaker telephone systems
FR1010952A (en) Improvements to telephone installations
FR970126A (en) Improvements to loudspeaker telephony installations
FR59705E (en) Improvements to telephone systems
FR993439A (en) Improvements to electrodynamic loudspeakers
FR970345A (en) Improvements to loudspeaker telephone systems
FR1012472A (en) Improvements to automatic telephone systems
FR996905A (en) Loudspeaker telephony enhancements
FR924759A (en) Improvements to loudspeaker telephone systems
FR1037434A (en) Improvements to loudspeaker telephony installations
FR1000845A (en) Stylograph refinements
FR1004672A (en) Bra refinements
FR1018464A (en) Improvements to telephone installations
FR993438A (en) Improvements to electrodynamic loudspeakers
FR1007879A (en) Improvements to two-wire loudspeaker telephone systems
FR1012101A (en) Improvements to bilateral speakerphone installations
CH285300A (en) Loudspeaker bilateral telephone system.