“excellent, both as a litigator and on the science front”

Chambers & Partners

Zoë Butler, Partner, is an experienced IP litigator with a strong technical background and has advised clients on IP disputes relating to a broad range of technological areas and industry sectors.















WIPR Leaders 2017 iam 1000 - Recommended Individual 2015



Ranked In - Chambers UK 2017 - Leading IndividualRanked In - Chambers Global 2016 - Leading IndividualThe Legal 500 UK - Recommended Lawyer 2015

Zoë has a broad practice advising clients across the range of IP rights. She is particularly known for her expertise in advising clients in complex patent disputes. Recently, Zoë has acted for a range of clients, from electronics and software companies to pharmaceutical and biotech companies in matters relating to patents, copyright, trade marks and design rights as well as contract and competition law.


In addition to representing clients before the UK courts, Zoë has experience of European Patent Office opposition proceedings, and has represented clients in arbitration proceedings and mediations relating to technology contract disputes. Zoë has been involved in many multi-jurisdictional disputes, working with advisors from across Europe, North America and Japan, and, in many instances, has taken a role in coordinating such litigation. In 2003, Zoë spent 6 months in The Hague seconded to the IP/ICT department of a leading
Dutch law firm.


Zoe has been a partner at Powell Gilbert since 2007. She is a member of AIPPI and EPLAW. She frequently lectures on IP law and is a tutor on the Oxford University Diploma in Intellectual Property Law and Practice. Zoë is a contributor to the CIPA Guide to the Patents Act.


In 2014 Zoë was the winner of best in TMT at the Euromoney LMG Europe Women in Business Law Awards.


Zoë Butler advises clients on all IP rights although she is best known for litigating sophisticated patent cases in electronics and life sciences.  She is recognised as one of the country’s leading IP lawyers, having an enviable client roster and record in life sciences patent disputes.
Chambers and Partners 2015


Demonstrating great range, Zoë Butler is at home on life sciences and high-tech cases, and is also an adroit performer across all areas of IP.
IAM 1000: The World's Leading Patent Practitioners 2014


Zoë Butler is “excellent, both as a litigator and on the science front.”

Chambers and Partners 2014


Zoë Butler is “an extremely skilled lawyer”
Legal 500 2013

Zoë Butler is “like a professional chess player: her strategic nous future-proofs her advice as she thinks through all the moves to the endgame”. She is proactive and instantly puts patent owners at ease”.
IAM 1000: The World's Leading Patent Practitioners 2012


Zoë Butler is a patent litigator who is sought out to advise on a range of technologies. Clients identify her scientific background, years of experience and grasp of detail as among the main factors in her success. She is considered a talented litigator with a strong track record in life sciences. Feedback indicates that she is “bright, reliable and embodies the best qualities of the firm.”

Chambers and Partners 2012


“first-rate” and “incredibly consistent – a joy to work with”

Who’s Who Legal, Life Sciences 2011


Zoë Butler is “capable and assured”

Legal 500 2011


Zoë Butler is recommended for IP/Patent Litigation, she is “hugely knowledgeable”, handling patent litigation in the life sciences and technology fields.

Chambers and Partners 2011


Zoë Butler is recommended for IP/Patent Litigation and Life Sciences. Zoë “enjoys a strong reputation” and advises on the full range of matters relating to IP rights in the sector and regularly appears before the EPO and in the UK courts.

Chambers and Partners 2010


Contact details

T +44 20 3040 8070
E zoe.butler@powellgilbert.com



1996 Solicitor
2007 Solicitor Advocate



MA (Natural Sciences and Law), Cambridge University
Diploma in Intellectual Property Law and Practice, Bristol University

Cases include
  • Good Technology v Airwatch (patent - mobile management technology)
  • CompactGTL v Velocys (patent - gas to liquid conversion)
  • Motorola v BT (patent - set top boxes)
  • Motorola v Microsoft (patent - smartphones)
  • Mölnlycke v BSN Medical (patent – wound dressing)
  • LG v Sony (patent – electronics)
  • Apple v Nokia (patent – smart phones)
  • Philips & others v Alba (patent – Electronics)
  • Dr Reddy’s Laboratories v Eli Lilly (patent – olanzapine)
  • Ivax v Chugai (patent – pharmaceutical formulation)
  • Sony Computer Entertainment v. Ball & others (copyright – copy protection circumvention devices)
  • Affymetrix v Multilyte (patent – DNA microarrays)
  • Oxford Gene Technology v Affymetrix (Patent / licence dispute – DNA microarrays)
  • Pharmacia v Merck (patent – COX 2 inhibitors)
  • Iomega v Nomai (trade mark / passing off – ZIP disc technology)
  • Unwired Planet v Huawei (patents/FRAND – telecoms)