Patent summaries

摘要

Full copies of the original patent documents can be obtained from: The British Library Patent Express, 25 Southampton Buildings, London WC2A 1AW. Fax: +44 (0)171 412 7930. US Patent Office, Scientific Library, 15th and East Streets, NW Washington, DC 20231, USA. The Japanese Patent Office, 4-3 Kaksumigaseki 3-chome Chiyoda-ku, Tokyo 100, Japan.