The Patent Cooperation Treaty (PCT for short) is the most important international treaty in the patent field after the Paris Convention for the Protection of Industrial Property, and it is another milestone in the development history of the international patent system. The treaty was signed by 35 countries in Washington on June 19th, 197. It was implemented on June 1, 1978. As of July, 213, * * * has 148 member countries and is under the jurisdiction of the Geneva-based World Intellectual Property Organization.
the following are the main contents: