If you use assistive technology (such as a screen reader) and need a
version of this document in a more accessible format, please email email@example.com.
Please tell us what format you need. It will help us if you say what assistive technology you use.
Patent decision: O/047/95 in the matter of application under section 17(3) for patent application no GB 9306357.6 in the name of Hugh Peter Davison dated 9 February 1995.