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Copies of patents, which contain fuller details and the addresses of
inventors, are available from science reference libraries around Britain.
For details of free public access and purchase price, contact the British
Patent Office at Concept House, Cardiff Road, Newport, Gwent NP9 1RH (Tel
0633 813535) or Science Reference and Information Service at 25 Southampton
Buildings, London WC₂A 1AY (Tel 071-323 7919).