| Company | Timeline | Status | |
| Hydrogen Supplies Limited Secretary • Accountant | 11 Jun 1998←7 Months→8 Jan 1999 | Active | |
Kingston Medical Gases Limited Secretary • Accountant | 13 Nov 1997←1 Year 1 Month→8 Jan 1999 | Dissolved | |
| Air Liquide Limited Secretary • Unreported | 1 Jan 1993←6 Years→8 Jan 1999 | Active | |
| Gas & Equipment Limited Secretary • Unreported | 1 Jan 1993←6 Years→8 Jan 1999 | Active | |
| Electrochem Limited Secretary • Unreported | 1 Jan 1993←6 Years→8 Jan 1999 | Dissolved | |
