| Company | Timeline | Status | |
| Tron Tech Limited Director • Unreported | 8 Feb 2007←19 Years→Current | Active | |
| Scanning Electron Microscope Technology Limited Director • Director | 28 Feb 1992←33 Years→Current | Active | |
| Scanning Electron Microscope Technology Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
