| Company | Timeline | Status | |
| Con Mech Group Limited Secretary • Unreported | 11 Oct 1991←9 Years→14 Sep 2001 | Active | |
| Con Mech Engineers Limited Secretary • Unreported | 23 Jul 1991←10 Years→14 Sep 2001 | Active | |
| C.S.Du Mont Limited Secretary • Unreported | 23 Jul 1991←10 Years→14 Sep 2001 | Dissolved | |
