If you use assistive technology (such as a screen reader) and need a
version of this document in a more accessible format, please email firstname.lastname@example.org.
Please tell us what format you need. It will help us if you say what assistive technology you use.
Patent decision: O/039/94 in the matter of an application under section 72 by Cego Limited for the revocation of patent no GB2081804B in the name of Securistyle Limited dated 21 April 1994.