Patent Cooperation Treaty in EnglishExecutive summary：This document contains a verion of the Patent Cooperation Treaty last modified on October 3 2001 This version is current as of the summer of 2007

ss of Rights Article 25： Effects of the International Application Chapter II： International Preliminary Examination Article 26： The Demand for International Preliminary Examination Article 27： Procedure Before the International Preliminary Examining Authority Article 28： The International Preliminary Examination Report Article 29： Amendment of the Claims Before the International Bureau Chapter III： Designation of States and Regional Offices Article 30： Designation of States Article 31： Regional Patents Chapter IV： Effects of the International Application and the International Preliminary Examination Article 32： Effects of the International Application Article 33： Effects of the International Preliminary Examination Chapter V： Common Provisions Article 34： Unity of Invention Article 35： Time Limits Article 36： Representation Article 37： Review by the Assembly Article 38： Amendments to Certain Articles and Annexes Article 39： Revision of the Treaty Article 40： Signature， Languages， Depository Article 41： Entry Into Force， Duration， and Termination Annex A： Regulations Under the Patent Cooperation Treaty Annex B： Schedule of Fees Under the Patent Cooperation Treat