| Company | Timeline | Status | |
| Flettner Ventilator Limited Director • Company Director | 26 Jun 1991←10 Days→6 Jul 1991 | Active | |
| Hale End Holdings Limited Director • Designer | 14 Jun 1991←5 Years→2 Sep 1996 | Active | |
| TT Electronics Wireless Devices Limited Director • Designer | 14 Jun 1991←5 Years→2 Sep 1996 | Active | |
