CH305270A - Loudspeaker bilateral telephone system. - Google Patents

Loudspeaker bilateral telephone system.

Info

Publication number
CH305270A
CH305270A CH305270DA CH305270A CH 305270 A CH305270 A CH 305270A CH 305270D A CH305270D A CH 305270DA CH 305270 A CH305270 A CH 305270A
Authority
CH
Switzerland
Prior art keywords
loudspeaker
telephone system
bilateral telephone
bilateral
telephone
Prior art date
Application number
Other languages
French (fr)
Inventor
Jeanlin Pierre
Original Assignee
Le Teleampliphone S A R L
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 Le Teleampliphone S A R L filed Critical Le Teleampliphone S A R L
Publication of CH305270A publication Critical patent/CH305270A/en

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)
  • Interface Circuits In Exchanges (AREA)
CH305270D 1950-09-06 1951-08-28 Loudspeaker bilateral telephone system. CH305270A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1024329T 1950-09-06

Publications (1)

Publication Number Publication Date
CH305270A true CH305270A (en) 1955-02-15

Family

ID=9578766

Family Applications (1)

Application Number Title Priority Date Filing Date
CH305270D CH305270A (en) 1950-09-06 1951-08-28 Loudspeaker bilateral telephone system.

Country Status (5)

Country Link
BE (1) BE505491A (en)
CH (1) CH305270A (en)
FR (2) FR1024329A (en)
GB (1) GB690720A (en)
LU (1) LU30955A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1129543B (en) * 1958-06-25 1962-05-17 Gylling & Co Ab Circuit arrangement for voice-controlled intercom systems

Also Published As

Publication number Publication date
FR61954E (en) 1955-06-01
GB690720A (en) 1953-04-29
BE505491A (en)
LU30955A1 (en)
FR1024329A (en) 1953-03-31

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