• 1973
    Establishment of Guard Sound (TbK).
  • 1976
    Start development of ignition system of gas water heater.
  • 1977
    Development of first semi-automatic gas water heater.
  • 1979
    Development of first automatic gas water heater.
  • 1985
    Renamed Guard Sound Industry Co., Ltd, capital NTD 6 million with 40 employees.
  • 1989
    First automatic gas water heater in China with technical support From TbK.
  • 1990
    Development of first battery type automatic gas water heater and Introduce to European market.
  • 1996
    ISO9002 certification.
  • 1997
    Factory relocation for increasing business.
  • 2001
    ISO9001 certification. Development of first battery type modulation system.
  • 2003
    Development of safety gas stove.
  • 2006
    Construction of second factory building. New SMT / Lead-free process production.
  • 2007
    ISO14001 certification.
  • 2008
    Introduce ERP (Enterprise Resource Planning) system.
  • 2010
    Construction of new die casting factory - BON Technology.
  • 2011
    Introduce PLM (Product Lifecycle Management) system.
    Joint venture “Inter Valve Industry” with the ebm-papst Landshut, Germany.
  • 2015
    OHSAS18001 certification.