BE519944A - - Google Patents

Info

Publication number
BE519944A
BE519944A BE519944DA BE519944A BE 519944 A BE519944 A BE 519944A BE 519944D A BE519944D A BE 519944DA BE 519944 A BE519944 A BE 519944A
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 BE519944A publication Critical patent/BE519944A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE519944D 1952-02-13 BE519944A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB377652A GB726906A (en) 1952-02-13 1952-02-13 Improvements in or relating to tone generators for telecommunication systems

Publications (1)

Publication Number Publication Date
BE519944A true BE519944A (zh)

Family

ID=9764704

Family Applications (1)

Application Number Title Priority Date Filing Date
BE519944D BE519944A (zh) 1952-02-13

Country Status (2)

Country Link
BE (1) BE519944A (zh)
GB (1) GB726906A (zh)

Also Published As

Publication number Publication date
GB726906A (en) 1955-03-23

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