Michael Silverleaf KC > Chambers of Iain Purvis KC > London, England > Lawyer Profile

Chambers of Iain Purvis KC
11 South Square


Barrister in many leading intellectual property cases involving: patents, trade marks, passing off, copyright and related rights, registered and unregistered designs, computer disputes, breach of confidence, performers rights, entertainment and media law, restraint of trade, trade libel, trade descriptions, related areas of European and domestic competition law; practice in tribunals and courts at all levels up to the House of Lords and European Courts of Justice and the UK and European Patent Offices. Recent cases include:

Advanced Bionics AG v MED-EL Elektromedizinische Gerate [2021] EWHC 2415 (Pat) – (Patents Court)

IPCom v Vodafone [2021] EWCA Civ 205 – (Appeal)

Pliteq Inc & Anor v iKoustic Ltd & Anor [2020] EWHC 2564 (IPEC) – (trade mark infringement/passing off)

Genentech v Comptroller [2020] EWCA Civ 475 – (Appeal)

Lifestyle Equities v Royal County of Berkshire Polo [2019] EWCH 1872 (Ch) Club – (trade mark infringement)

Warner-Lambert Company LLC v Generics (UK) Ltd t/a Mylan and anr [2018] UKSC 56 – (Supreme Court)

Wobben Properties GmbH v Siemens Public Ltd Company & Ors [2017] EWCA Civ 5 – (Appeal)

Victoria Plum Ltd (t/a Victoria Plumb) v Victorian Plumbing Ltd & Ors [2016] EWHC 2911 (Ch) – (Trade mark infringement)

Generics (UK) Ltd (t/a Mylan) v Warner-Lambert Co LLC [2016] EWCA Civ 1006 – (Appeal)

Napp Pharmaceutical Holdings Ltd v Dr Reddy’s Laboratories (UK) Ltd and Sandoz Ltd [2016] EWHC 1517 (Pat) (patent infringement);

Richter Gedeon Vegyeszeti Gyar RT v Generics (UK) Ltd (t/a Mylan) [2016] EWCA Civ 410 (patent validity);

The Sofa Workshop Ltd v Sofaworks Ltd [2015] EWHC 1773 (IPEC) (trade mark infringment, passing off);

JW Spear v Zynga [2015] EWCA Civ 290 (trade mark infringement);

Starbucks v BSkyB (UKSC 2013/0274) (passing off);

Fresh Trading Ltd v Deepend Fresh Recovery Ltd [2015] EWHC 52 (copyright);

Interflora v M&S [2014] EWCA Civ 1403 (Google ad words);

Nokia v HTC (patent infringement, standards essential licensing) (2013-4, settled);

Confidential design arbitration, 32Red of [2013] EWHC 815 (Ch) (damages inquiry);

32Red Ltd v William Hill Gaming (UK) Ltd [2012] EWCA Civ 19 (trade marks);

Football DataCo v Sportradar [2013] EWCA Civ 27 (database right);

Samsung v Apple [2012] EWCA Civ 1339 (registered designs of tablet computers);

Schlumberger Holdings Ltd v Electromagnetic Geoservices AS [2010] RPC 33 (CA) (inventive step, validity, patents);

Abbott v Bayer (EPO anti-TNF alpha human monoclonal antibodies);

Newspaper Licensing Agency Ltd v Meltwater Holding BV [2011] RPC 7 (ChD), [2012] RPC 1 (CA) (copyright licensing schemes, literary works).


Trained Gray’s Inn, qualified 1980; QC 1996; junior counsel to the treasury in patent matters 1991-96; qualified as a mediator 2004 and practises actively in this field; appointed to Nominet DRS Expert Panel member 2008-12. Publications: ‘Passing Off Law and Practice’ (Butterworth’s 2nd ed 1995); also many articles in the legal press and papers delivered at professional conferences and seminars.




Intellectual Property Bar Association; Chancery Bar Association.


King’s College School, Wimbledon; Imperial College, London (1975 BSc Physics); Inns of Court School of Law.


Cycling, hockey, walking and reading.

Lawyer Rankings

London > Dispute resolution > Mediators

(Mediators)Ranked: Tier 5

Michael Silverleaf KC11 South Square

Michael Silverleaf KC – 11 South Square 

A member of the Nominet Dispute Resolution Service expert panel since 2008, 11 South Square‘s Michael Silverleaf KC is regularly instructed to act as a mediator in IP-related disputes.

Michael Silverleaf KC – 11 South Square 

A member of the Nominet Dispute Resolution Service expert panel since 2008, 11 South Square‘s Michael Silverleaf KC is regularly instructed to act as a mediator in IP-related disputes.

London Bar > IT and telecoms (infrastructure and contracts)

(Leading Silks)Ranked: Tier 1

Michael Silverleaf KC11 South Square

The barristers at 11 South Square showcase combined expertise in intellectual property and telecoms disputes, often acting for major clients in cases with a crossover element. Appearing before the Court of Appeal, Michael Silverleaf KC acted for the Ministry of Defence in IPCom v Vodafone, intervening with the agreement of the parties, regarding the crown use provisions of Patents Act 1977; the case involves a technology that can be used to prioritize emergency services users over the mobile phone network. In Philips v Xiaomi, Mark Vanhegan KC represents the claimant in connection with patents declared to be essential to 3G and 4G standards. Vanhegan also went up against Brian Nicholson, who represented the defendant, in Facebook v Voxer, a dispute focused on a patent revocation action.

London Bar > Media and entertainment

(Leading Silks)Ranked: Tier 4

Michael Silverleaf KC11 South SquareMichael is extremely authoritative. He is clear in his advice and clients understand him – he is very user friendly.

London Bar > Intellectual property

(Leading Silks)Ranked: Tier 1

Michael Silverleaf KC11 South SquareMichael is a superb advocate and extremely good with clients. His approach is always aimed at providing the best result for the client, and he is a strong believer in mediation (where appropriate) and a very effective mediator himself. He has been involved in numerous high-profile cases and performs at the highest level in his field.