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/107/94 in the matter of an application under section 13(1) by Hazel Elisabeth Johnson and Christopher Michael Wathes for patent application 2232759 in the name of Cambridge Isolation Technology Ltd and The University of Bristol dated 29 July 1994.