BE776002A - DEVICE FOR TELEPHONE INTERCOMMUNICATIONS IN DUPLEX USING SPEAKERS. - Google Patents

DEVICE FOR TELEPHONE INTERCOMMUNICATIONS IN DUPLEX USING SPEAKERS.

Info

Publication number
BE776002A
BE776002A BE776002A BE776002A BE776002A BE 776002 A BE776002 A BE 776002A BE 776002 A BE776002 A BE 776002A BE 776002 A BE776002 A BE 776002A BE 776002 A BE776002 A BE 776002A
Authority
BE
Belgium
Prior art keywords
intercommunications
speakers
duplex
telephone
telephone intercommunications
Prior art date
Application number
BE776002A
Other languages
French (fr)
Original Assignee
Challe Claude A E
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
Priority to BE563860D priority Critical patent/BE563860A/fr
Application filed by Challe Claude A E filed Critical Challe Claude A E
Priority to BE776002A priority patent/BE776002A/en
Publication of BE776002A publication Critical patent/BE776002A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
BE776002A 1971-11-30 1971-11-30 DEVICE FOR TELEPHONE INTERCOMMUNICATIONS IN DUPLEX USING SPEAKERS. BE776002A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE563860D BE563860A (en) 1971-11-30
BE776002A BE776002A (en) 1971-11-30 1971-11-30 DEVICE FOR TELEPHONE INTERCOMMUNICATIONS IN DUPLEX USING SPEAKERS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE776002A BE776002A (en) 1971-11-30 1971-11-30 DEVICE FOR TELEPHONE INTERCOMMUNICATIONS IN DUPLEX USING SPEAKERS.

Publications (1)

Publication Number Publication Date
BE776002A true BE776002A (en) 1972-03-16

Family

ID=3858939

Family Applications (2)

Application Number Title Priority Date Filing Date
BE563860D BE563860A (en) 1971-11-30
BE776002A BE776002A (en) 1971-11-30 1971-11-30 DEVICE FOR TELEPHONE INTERCOMMUNICATIONS IN DUPLEX USING SPEAKERS.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
BE563860D BE563860A (en) 1971-11-30

Country Status (1)

Country Link
BE (2) BE776002A (en)

Also Published As

Publication number Publication date
BE563860A (en)

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