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