Patent summaries

摘要

Full copies of the original patent documents can be obtained from: The British Library, 96 Euston Road, London NW1 2DB, UK. US Patent and Trademark Office, 600 Dulany Street, Madison East, Concourse Level, Alexandria, VA 22314, USA. The Japanese Patent Office, 3-4-3 Kasumigaseki, Chiyoda-ku, Tokyo 100-8915, Japan.