Leaders Directory

WIPR Leaders is a one-stop guide to the leading IP practitioners in the world. The handbook lists over 1,500 lawyers across two volumes: over 900 individuals in the both the patent and the trademarks section (some individuals are in both). Stemming from a four month nomination period in which we sought views from 12,000 IP professionals, our research team vetted every nominated lawyer for suitability by exploring their work. This meant looking at practice history, industry expertise and notable cases, as well as any additional activities, such as writing and teaching responsibilities, which have allowed the lawyers to shape and influence other and future IP practitioners.

Interested in obtaining our WIPR Leaders handbooks? Find out more about the handbooks here.

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Janice Bereskin

Janice Bereskin

Janice Bereskin is a partner with Bereskin & Parr and a co-leader of the firm’s trademarks practice group. Her practice focuses…

  • Partner
  • Bereskin & Parr
  • Canada

Carlos Pérez De La Sierra

Carlos Pérez De La Sierra is a founding partner at Calderón & De La Sierra and has focused his practice on counselling, prosecution,…

  • Founding Partner
  • Calderón & De La Sierra
  • Mexico

Carol Plunkett

Carol Plunkett

Carol Plunkett retired from the partnership in December 2017 is now a consultant with William Fry. A commercial litigator of 40…

  • Consultant
  • William Fry
  • Ireland

Casey Chisick

Casey Chisick

Casey Chisick is a partner at Cassels Brock and has experience in all areas of IP and entertainment law, providing transactional…

  • Partner
  • Cassels Brock & Blackwell
  • Canada

Constance Rhebergen

Constance Rhebergen achieved her BS in chemical engineering from Northwestern University in 1986, her JD from the University of…

  • Partner
  • Bracewell
  • United States

Donald Cameron

Donald Cameron

In one of Donald Cameron’s notable cases he took on Hoffman La-Roche on behalf of Janssen and Amgen over a biologic patent.…

  • Partner
  • Bereskin & Parr
  • Canada

Eric Bakker

Eric Bakker has more than 30 years’ experience as an intellectual property attorney and specialises in brand protection and…

  • Trademark attorney
  • Bakker & Verkuijl
  • Netherlands

Erla Árnadóttir

Erla Árnadóttir has practised law since 1984 and joined Lex in 2000. She focuses her practice on intellectual property law including…

  • Supreme court attorney
  • Lex
  • Iceland

Glenn Gundersen

Glenn Gundersen

Glenn Gundersen represents clients in the consumer electronics, cosmetics, entertainment, telecommunications, and luxury goods…

  • Partner
  • Dechert
  • United States

Hans Erik Johnsen

Hans Erik Johnsen’s practice focuses on intellectual property, trademark and marketing law. He has represented clients in the…

  • Partner
  • Wiersholm
  • Norway

Hélio Fabbri

Hélio Fabbri is a partner at Ariboni Fabbri & Schmidt Sociedade de Advogados, where he has worked since 1989. He graduated from…

  • Partner
  • Ariboni Fabbri & Schmidt Sociedade de Avogados
  • Brazil

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