Contact Us: PCT – The International Patent System

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Additional information

General or legal questions about the PCT

For questions concerning a specific application you can directly contact the authorized officer using the details indicated at the bottom of the IB form.

Questions about filing a PCT application using the RO/IB

  • Tel: +41 22 338 9222 (Monday to Friday 09:00–18:00 CET)
  • RO/IB webpage

In the case of filing by hand-delivery, a letter box is available 24 hours a day, seven days a week.

Questions about e-filing

Tel: +41 22 338 9523 (Monday to Friday 09:00–18:00 CET)