Andreas Welch

European Patent Attorney at Hepp Wenger Ryffel AG

Andreas Welch is a Swiss and European patent attorney and has also obtained the European litigation diploma (European Patent Institute/Centre for International Intellectual Property Studies). Dr Welch is a chemist with additional expertise in the medicinal chemistry and biochemistry area. He completed a doctorate in organic chemistry (summa cum laude) and has worked for Hepp Wenger Ryffel since 2001. Dr Welch has also gained experience as in-house counsel of a large pharmaceutical company, where he was involved in managing worldwide patent disputes, among other things.

Dr Welch’s technical focus is on chemistry-related inventions and in particular on the pharmaceutical area. He advises domestic and international clients on all aspects of IP-related matters and is regularly involved in opposition and appeal proceedings at the European Patent Office, as well as in revocation and infringement proceedings at the Swiss Federal Patent Court. In addition, he has extensive experience in managing litigation in numerous jurisdictions.

Dr Welch wrote the chapter on Switzerland in the manual International Pharmaceutical Law and Practice (LexisNexis). He is fluent in German and English and has a good understanding of French. He is a member of the Institut für den gewerblichen Rechtsschutz and the Verband der freiberuflichen Europäischen und Schweizer Patentanwälte.

Professional associations

  • epi

Firm details

Hepp Wenger Ryffel AG
Friedtalweg 5
Wil 9500

Contact details

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