Hydro Research & Development (UK) Limited | 18th January 1980 to 1st November 1985 |
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Hydro Research & Development Limited | 1st November 1985 to 1st September 1997 |
H.R.D. Limited | 1st September 1997 to 12th September 1997 |
HRD Ltd | 12th September 1997 to 16th January 2004 |
Hydro International (UK) Ltd | 16th January 2004 to current |