| Company | Timeline | Status | |
Derwent Crystal Limited Director • Engineer | 28 Mar 1992←27 Years→29 Oct 2019 | Dissolved | |
Abbeville Instrument Control Limited Director • Engineer | 31 Dec 1991←27 Years→31 Oct 2019 | Dissolved | |
Georgian Crystal (Tutbury) Limited Director • Engineer | 16 Jan 1991←15 Years→13 Sep 2006 | Dissolved | |
