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Additional information

General or legal questions about the Patent Cooperation Treaty (PCT)

Tel: +41 22 338 8338
(Monday to Friday 9.00 am - 6.00 pm CET)
Fax: +41 22 338 8339 (will be discontinued in 2019)
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.

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Questions about filing a PCT application using the RO/IB

Tel: +41 22 338 9222
(Monday to Friday 9.00 am - 6.00 pm CET)
Fax: +41 22 910 0610 (will be discontinued in 2019)
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 9.00 am - 6.00 pm CET)