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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 London
Patient Office at State House, 66-71 High Holborn, London WC₁R
4TP (Tel 071-831 2525) or Science Reference and information Service at 25
Southampton Buildings, London WC₂A 1AY (Tel 071-323 7919).