Inventors:
Patrick Arthur White - Sharnford, GB
Malcolm John Hayhurst - Coventry, GB
Alan R Owens - Nuneaton, GB
Ian David Roughsedge - Mobile AL
Richard James Davies - South Humberside, GB
Alan Sellars - South Humberside, GB
Jacqueline Fave MacDonald - Bebington, GB
Michael Colin Quigley - Meriden, GB
Ralph Draper - Coventry, GB
Ronald Derek Payne - Barrow-upon-Humber, GB