BE399269A - - Google Patents

Info

Publication number
BE399269A
BE399269A BE399269DA BE399269A BE 399269 A BE399269 A BE 399269A BE 399269D A BE399269D A BE 399269DA BE 399269 A BE399269 A BE 399269A
Authority
BE
Belgium
Prior art keywords
vehicle
microphone
signal
receiver
installation
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE399269A publication Critical patent/BE399269A/fr

Links

Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00Audible signalling systems, e.g. audible personal calling systems
    • G08B3/10Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Traffic Control Systems (AREA)
BE399269D BE399269A (https=)

Publications (1)

Publication Number Publication Date
BE399269A true BE399269A (https=)

Family

ID=65620

Family Applications (1)

Application Number Title Priority Date Filing Date
BE399269D BE399269A (https=)

Country Status (1)

Country Link
BE (1) BE399269A (https=)

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