1985 Formed Nam Fung Company in Hong Kong, started to manufacture metal contact domes (metal domes).
1986 Joint Venture with Mel Bowman Assoc. USA. Mel Bowman Assoc. is Engineering & Marketing house in USA whose expertise is in metal contact parts (metal domes).
1987 Reformed the Company and named as True Tone Industries Ltd., continuing in metal contact domes manufacturing.
1989 Firstly purchased our own factory plant in Kwun Tong Industrial Area in Hong Kong.
1990 Started to import materials directly from Japanese and American material suppliers to upgrade the quality.
1993 Moved and expanded our factory plant in the same industrial area.
1994 Installed Electrical Discharge Machine (E.D.M.) to upgrade our tooling.
1996 Installed Japan and Taiwan made high speed Automatic Presses to upgrade products stability and to ensure quality.
1998 Imported Gold-plated, Silver-plated and Nickel-plated stainless steel materials from Japan to manufacture metal contact domes to fulfill particular customers’ requirements.
1999 The third time to move and expand our factory plant to meet our target on annual output up to 30 million pieces of metal contact domes.
2000 Especially imported various measuring and testing equipment such as life testing, conductive testing equipment, etc., to meet various electrical/membrane switch manufacturers’ requirements.
2002 Certified ISO 9001:2000 on the Manufacturing of Metal Contact Domes for the Electronic Industry by TUV on February 2002.
2003 The fourth time to expand our factory plant to improve production management.
2005 Adding numbers of high speed Automatic Presses to increase another 30% productivity. All our products have been tested to be complied with the RoHS by SGS Hong Kong Ltd.
2009 Efforts to upgrade our technology, technique and equipment for tools fabrication.
2013 Property invested, company offices renovations.
2018 Certified ISO 9001:2015 on the Manufacturing of Metal Contact Domes for the Electronic Industry by TUV.
