organized by the World Intellectual Property Organization (WIPO) with the cooperation of the Invention Committee of the States Commission of Science and Technology of the Democratic People's Republic of Korea and with the assistance of the United Nations Development Programme (UNDP); Contents : BLUMSTENGEL, Reiner. General introduction to the patent system; WIPO. The World Intellectual Property Organization : WIPO's development cooperation program; JANSSON, Ulf. Patentability; GUTMANN, Ernest. Patent rights; BLUMSTENGEL, Reiner. Patent applications : their elements and physical requirements; GUTMANN, Ernest. The drafting of patent applications; GUTMANN, Ernest. Patent agents; LULIN, Gao. Preliminary examination; JANSSON, Ulf. Examination as to substance; LULIN, Gao. Opposition procedure and re-examination; JANSSON, Ulf. Patent grant : invalidation;.