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/165/96 in the matter of an application under section 37 by Eric Russell Chappell in respect of GB patent no 2238414 in the names of Ronald Thomas and Helmut Stohr dated 22 October 1996.