| Company | Timeline | Status | |
| Duncan Propellers Holdings Limited Director • Unreported | 14 Apr 2009←16 Years→Current | Active | |
| Teignbridge Propellers International Limited Director • Unreported | 14 Apr 2009←16 Years→Current | Active | |
| Sabre Buildings Management Company Limited Director • Director | 23 Aug 2005←3 Years→6 Mar 2009 | Active | |
| Duncan Propellers Limited Director • Unreported | 11 Nov 2004←21 Years→Current | Active | |
| Duncan Research & Development Ltd Director • Unreported | 13 Feb 1998←27 Years→Current | Active | |
