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General or legal questions about the PCT
- Tel: +41 22 338 8338 (Monday to Friday 09:00–18:00 CET)
- Fax: +41 22 338 8339 (will be discontinued as of January 1, 2020)
- PCT Information Service
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)
- Fax: +41 22 910 0610 (will be discontinued as of January 1, 2020)
- 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)