organized by the World Intellectual Property Organization (WIPO) in cooperation with the Institute of Inventions and Rationalization of Bulgaria and with the assistance of the United Nations Development Programme (UNDP); Contents : WIPO. General introduction to the use of patent documents and the technological information contained therein; WIPO. The International Patent Classification (IPC), its philosophy and use; International cooperation in the field of patent information and the role of WIPO;.