| Company | Timeline | Status | |
| Cirrus Laser Limited Director • Engineer | 14 Nov 1991←1 Year 6 Months→19 May 1993 | Active | |
| Nimbus Diamond Tool & Machine Co. Limited Director • Engineer | 31 Jul 1991←1 Year 9 Months→19 May 1993 | Active | |
| Cirrus Laser Limited Director • Unreported | 1 Jan 1970←23 Years→19 May 1993 | Active | |
