BE363032A - - Google Patents

Info

Publication number
BE363032A
BE363032A BE363032DA BE363032A BE 363032 A BE363032 A BE 363032A BE 363032D A BE363032D A BE 363032DA BE 363032 A BE363032 A BE 363032A
Authority
BE
Belgium
Application number
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.)
Publication of BE363032A publication Critical patent/BE363032A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
BE363032D 1929-06-22 BE363032A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1944283X 1929-06-22

Publications (1)

Publication Number Publication Date
BE363032A true BE363032A (zh)

Family

ID=7750643

Family Applications (1)

Application Number Title Priority Date Filing Date
BE363032D BE363032A (zh) 1929-06-22

Country Status (3)

Country Link
US (1) US1944283A (zh)
BE (1) BE363032A (zh)
FR (1) FR680306A (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR948355A (fr) * 1942-12-31 1949-07-29 Western Electric Co Dispositif de couplage utilisables dans les systèmes de transmission d'ondes
US3135829A (en) * 1959-10-09 1964-06-02 Itt Conference call circuit
US3891801A (en) * 1974-01-21 1975-06-24 Quindar Electronics Four-way four-wire active bridge
US3885100A (en) * 1974-05-31 1975-05-20 Bell Telephone Labor Inc Six-port conference amplifier circuit
US4008376A (en) * 1975-10-17 1977-02-15 Bell Telephone Laboratories, Incorporated Loudspeaking teleconferencing circuit
US4289932A (en) * 1979-10-15 1981-09-15 Reed Roger R Conferencing communications system
US12048394B2 (en) 2020-09-16 2024-07-30 Haig Levon Gulian Grill

Also Published As

Publication number Publication date
FR680306A (zh) 1930-04-26
US1944283A (en) 1934-01-23

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