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Logo of WIPO PCT, the international patent system

PCT – The International Patent System

Protect and manage your patent abroad

The Patent Cooperation Treaty (PCT) establishes a cost-effective means for companies and innovators to seek international patent protection for inventions in up to 158 Contracting States. A single international patent application successfully filed under the PCT has the same legal effect as filing separate patent applications in all Contracting States.

It also greatly facilitates the processing and examination of international patent applications by national patent Offices and provides the general public with access to technical disclosures contained in international applications.


The PCT: Seeking Patent Protection Beyond Borders

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  • PCT Newsletter – News and information for users of the PCT System, including fee tables and seminars. Monthly.
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How to use the PCT system


File a PCT application
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File an international patent application with the PCT system

Learn about how to file a PCT patent application, including the required elements, basic requirements, practical details and applicable fees

Manage your PCT application
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Manage your international patent application with the PCT system

Understand how to manage your PCT patent application throughout the international phase, including important procedures and deadlines

Enter the national phase
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Enter the national phase of the PCT system

Find out when and how to proceed with your PCT application in the national phase

ePCT – PCT System online services by WIPO

Use ePCT to file and manage your international patent applications as an applicant, or process international patent applications as a patent Office.

Go to ePCT

PCT system education resources

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PCT training events and resources

Register for upcoming PCT training events or explore past training recordings and resources

(photo: getty/Thanakorn Lappattaranan)

Learn the PCT video series

Learn the PCT through video lectures by topic

distance learning
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Introductory course on the PCT system - DL101

Take a PCT course via the WIPO Distance Learning program

distance learning
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PCT System success stories

Discover the stories of companies and inventors that have successfully registered for international patent protection with the PCT System

Questions about the PCT System?

Our PCT Information Service team is available to answer your general and legal questions and guide you through the various aspects of using the PCT System. 

Need to talk to someone? Call us: +41 22 338 8338 (Monday to Friday 09:00–18:00 CET)


Contact PCT Infoline