Leaders Directory

WIPR Leaders is a one-stop guide to the leading IP practitioners in the world. The handbook lists over 1,700 lawyers across patent, trademark, and copyright practices. 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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Ana Celidonio

Ana Celidonio

Ana Celidonio’s specialism includes patents, business secrets, biotechnology, designs and plant varieties. She graduated with…

  • Partner
  • Lobo de Rizzo
  • Brazil

Christine Kanz

Christine Kanz

Christine Kanz has worked as an attorney since 1998. Although she has primarily focused on international patent litigation in…

  • Partner
  • Hoyng Rokh Monegier
  • Germany

Claudia Milbradt

Claudia Milbradt

Claudia Milbradt heads the German IP practice of Clifford Chance, specializing in patent and trade mark litigation and strategic…

  • Partner
  • Clifford Chance
  • Germany

Eldora Ellison

Eldora Ellison

Eldora Ellison is a director at Sterne Kessler Goldstein & Fox in the biotechnology and chemical and trial and appellate practice…

  • Director
  • Sterne Kessler Goldstein & Fox

Gunars Gaikis

Gunars Gaikis

Gunars Gaikis is a pre-eminent and pioneering leader in life sciences IP. He has particularly focused on patent, regulatory and…

  • Partner
  • Smart & Biggar
  • Canada

Heidi Lindner

Heidi Lindner

Heidi Lindner is a founding partner and head of the patent litigation department at Arochi & Lindner. She has experience in patent…

  • Founding Partner
  • Arochi & Lindner
  • Mexico

Inga-Lill Andersson

Inga-Lill Andersson

Inga-Lill Andersson is a senior European patent attorney who specialises in chemistry and biotechnology, focusing on protein chemistry,…

  • Business area manager, north Sweden
  • AWA Sweden
  • Sweden

Lara Dorigo

Lara Dorigo

Lara Dorigo represents and advises clients in contentious and non-contentious IP matters. She has particularly vast experience…

  • Counsel
  • Lenz & Staehelin
  • Switzerland

MaryAnne Armstrong

MaryAnne Armstrong

MaryAnne Armstrong is a partner at Birch, Stewart, Kolasch & Birch, and focuses her practice on prosecuting patent applications…

  • Partner
  • Birch, Stewart, Kolasch & Birch

Melisa Litvin

Having practised IP law for more than 17 years, Melisa Litvin has gained experience in all areas of IP including patents, trademarks,…

  • Founding partner
  • Litvin Marzorati Legales
  • Argentina

Nicola Dagg

Nicola Dagg

Nicola Dagg leads Kirkland & Ellis' intellectual property litigation practice in London. She has experience in the enforcement…

  • Partner
  • Kirkland & Ellis
  • UK

Vladislav Ugryumov

Vladislav Ugryumov

Vladislav Ugryumov specialises his practice in patent litigation and prosecution and has extensive experience representing clients…

  • Partner
  • Gowling WLG
  • Russia

At van Rooy

At van Rooy

At van Rooy is a director, head of the patent department and executive committee chairman at Kisch IP and has 26 years of experience…

  • Director
  • Kisch IP
  • South Africa

Aysel Korkmaz Yatkin

For the last 12 years, Aysel Korkmaz Yatk?n has been representing and advising some of the world’s biggest global pharmaceutical…

  • Managing associate
  • Gün + Partners
  • Turkey

Barry Purdy

Barry Purdy is a co-founder of PurdyLucey and has more than 20 years’ experience advising clients on intellectual property matters.…

  • Co-founder
  • PurdyLucey
  • Ireland

Bart Swinkels

Bart Swinkels

Bart Swinkels is a partner at NLO and has worked there since 2000. Before joining the firm he worked as a molecular biologist…

  • Partner
  • NLO
  • Netherlands

Bert Oosting

Bert Oosting

Bert Oosting graduated from the University of Utrecht with a degree in neuropsychology in 1986 and then worked as a researcher…

  • Partner
  • Hogan Lovells
  • Netherlands

Brian Kingwell

Brian Kingwell

Brian Kingwell is a partner at Gowling WLG and works in the firm’s Vancouver office. For more than 20 years he has focused his…

  • Partner
  • Gowling WLG
  • Canada

Christina Gates

Christina Gates’ PhD in molecular biology emphasises her experience in the biotechnology, biochemistry and medical devices fields,…

  • Managing partner
  • Tomkins & Co
  • Ireland

Clara-Ann Gordon

Clara-Ann Gordon

Clara-Ann Gordon is specialised in the areas of TMT/outsourcing, data privacy, internal investigations/e-discovery and compliance,…

  • Partner
  • Niederer Kraft Frey
  • Switzerland

Dag Sandart

Dag Sandart has worked at Sandart & Partners since 1986 and has experience in patent, trademark, marketing, life sciences and…

  • Partner
  • Sandart & Partners
  • Sweden

Daniel DiNapoli

Daniel DiNapoli is a partner at Kaye Scholer and has experience in all areas of intellectual property law. He has focused his…

  • Attorney
  • Kaye Scholer
  • United States

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