TREA

Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers

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Industry

  • CPC
  • H04M1/677
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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M1/00Substation equipment

Current Industry

H04M1/677Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers
Industries