||The Patent Cooperation Treaty "simplifies and reduces the cost of obtaining international patent protection and facilitates public access to a wealth of technical information relating to inventions. By filing one international patent application under the PCT you can simultaneously seek protection for an invention in over one hundred countries, including developing countries, throughout the world." (From Patent Cooperation Treaty Home Page.)
This version of the treaty is the treaty done at Washington on June 19, 1970, amended on September 28, 1979, modified on February 3, 1984, and October 3, 2001(as in force from April 1, 2002). The Treaty is also available in HTML format.