BE333678A - - Google Patents

Info

Publication number
BE333678A
BE333678A BE333678DA BE333678A BE 333678 A BE333678 A BE 333678A BE 333678D A BE333678D A BE 333678DA BE 333678 A BE333678 A BE 333678A
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 BE333678A publication Critical patent/BE333678A/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)
  • Electric Propulsion And Braking For Vehicles (AREA)
BE333678D 1925-05-29 BE333678A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1420925A GB253350A (en) 1925-05-29 1925-05-29 Improvements in automatic telephone systems

Publications (1)

Publication Number Publication Date
BE333678A true BE333678A (enrdf_load_stackoverflow)

Family

ID=10037021

Family Applications (1)

Application Number Title Priority Date Filing Date
BE333678D BE333678A (enrdf_load_stackoverflow) 1925-05-29

Country Status (4)

Country Link
BE (1) BE333678A (enrdf_load_stackoverflow)
CH (1) CH122198A (enrdf_load_stackoverflow)
FR (1) FR618081A (enrdf_load_stackoverflow)
GB (1) GB253350A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR618081A (fr) 1927-03-02
CH122198A (de) 1927-10-01
GB253350A (en) 1926-06-17

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