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

Tel: +41 22 338 8338
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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
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Tel: +41 22 338 9523
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