'An incredibly good set for IP matters'.
Legal 500 2010
"8 New Square brims with barristers experienced in fighting fiendishly complex, high-value IT and telecoms disputes."
Chambers & Partners 2014
"8 New Square is undoubtedly one of the leading sets for trade mark and copyright cases within the media and entertainment sphere, so much so that stablemates here frequently find themselves pitted against each other in major cases."
Chambers & Partners (Media & Entertainment) 2014
'Top drawer IP set.'
Legal 500 2010
'A veritable powerhouse of IP expertise'
Chambers and Partners 2011
"Fantastic roster of talent" and recommended for being "very modern, forward-thinking and providing sound commercial advice" as well as offering instructing solicitors "a very broad skill set in the soft IP space."
Chambers & Partners 2017
'excellence on IT matters'
Legal 500 (Information Technology) 2010
"There are great people there at all levels and the clerks are very accommodating."
Chambers & Partners (Intellectual property) 2014
"8 New Square brims with barristers experienced in fighting fiendishly complex, high-value IT and telecoms disputes."
Chambers & Partners (Information Technology) 2014
"an impressive set with quality from the top
silk down to the most junior barristers."
Chambers & Partners (Information Technology) 2013
'Practical and helpful clerks" provide a "smooth and personable service.'
Chambers and Partners 2011
'A number of great IT and telecoms barristers.'
Legal 500 2010
The clerks are described as "helpful," "generous" and "very good at knowing what you want."
Chambers & Partners (Intellectual Property) 2013
Mark Chacksfield
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Year of call: 1999
Described in the directories as “enormously bright and diligent, with a keen focus on client demands”, “a knowledgeable and deeply impressive adviser on the full spectrum of IP disputes” and “widely considered to be one of the rising stars of the IP Bar”, Mark has been nominated for the Chambers and Partners IP/IT Junior of the Year in both 2014 and 2015. He practices in all areas of intellectual property law, with particularly strong expertise in major patent litigation where he is described as a “sector leading” litigator. He has considerable experience in appearing as the sole advocate both at first instance and in the Court of Appeal, as well as in the EPO.
Mark has an outstanding reputation in the patents field, having acted in many of the leading cases. Recent pharmaceutical and biotech cases include FKB v. AbbVie (‘Arrow declarations’, adalimumab), Teva v. Boehringer (inhaled tiotropium), Novartis v. Focus (rivastigmine patches), Hospira v. Genentech (Herceptin), Teva v. Leo (calcipotriol/betamethasone), Resolution Chemicals v H. Lundbeck (escitalopram/res judicata), Teva v Merck (efavirenz/quia timet actions), Eli Lilly v HGS (Neutrokine-α), Regeneron Pharmaceuticals v Genentech (VEGF Trap-EYE®/Lucentis®), Ranbaxy v AstraZeneca (Swiss-form claims/esomeprazole), and Convatec v Smith & Nephew (Durafiber® wound care products). Mark has represented Nokia in the Interdigital, IPCom and HTC litigations, and Unwired Planet against Google, Samsung and Huawei, as well as working with a number of other high profile telecoms and licensing companies on both standards essential and non-essential patents. He has also appeared in both high tech and mechanical patent actions, including appearing alone in the leading Court of Appeal case on indirect infringement of Grimme Landmaschinenfabrik GmbH & Co. KG v Derek Scott
Other areas of practice include media and entertainment, where Mark has represented broadcasters, record companies, picture libraries and well-known personalities in copyright and privacy claims, as well as having experience in musical copyright actions concerning substantial hits. His media clients include Northern & Shell, the Premier League Football Association, the Ian Fleming Estate, the BBC, ITV Network, Phonographic Performance, and various record companies and well known personalities.
Trade mark, passing off, copyright, design rights and complex copyright/breach of confidence actions (often involving commercial information such as client lists or technical software disputes), constitute other common areas of his practice. Mark also has experience in professional negligence cases concerning patent and IP professionals, the most recent being Kerr v Lawrence Shaw & Associates.
Recent Activity
» Fujifilm Kyowa Kirin Biologics Company v Abbvie Biotechnology and Others
» Fujifilm Kyowa Kirin Biologics Co. Limited v Abbvie Biotechnology Limited and Abbvie Limited [2017] EWCA Civ 1
» Fujifilm Kyowa Kirin Biologics Co. and Samsung Bioepis UK (2) Biogen IDEC -and- v AbbVie Biotechnology Ltd [2016] EWHC 3383 (Ch)
» (1) Novartis AG (2) LTS Lohmann therapie-systeme AG (3) Novartis Pharmaceuticals UK Ltd v (1) Focus Pharmaceuticals UK Ltd (2) Actavis Group PTC EHF (3) Actavis UK Ltd and between: (1) Novartis AG (2) LTS Lohmann therapie-systeme AG (3) Novartis Pharmaceuticals UK Ltd v Teva UK Ltd
» Teva UK LTD v Boehringer Ingelheim Pharma GMBH & Co KG [2016] EWCA Civ 1296
» Hospira UK LTD v Genentech INC [2016] EWCA Civ 1185
» Unwired Planet International Ltd v Huawei Technologies Ltd, Samsung Electronics Co Ltd and others [2016] EWHC 576 (Pat)
» Accord v Medac [2016] EWHC 24 (Pat)
» Unwired Planet v Huawei and Samsung [2015] EWHC 3366 (Pat)
» Hospira UK Limited v Genentech Inc [2015] EWHC 1796 (Pat)
» Novartis AG & Ors v Focus Pharmaceuticals Ltd & Ors [2015] EWHC 1068 (Pat) (27 April 2015)
» Hospira (UK) Ltd v Genentech, Inc [2015] EWCA Civ 57
» Hospira UK Ltd v Genentech Inc [2014] EWHC 3857 (Pat)
» Teva UK Ltd & Anor v Leo Pharma A/s [2014] EWHC 3096 (Pat)
» Hospira v Genentech [2014] EWHC 1094 (Pat)
» D. Jacobsen & Sons v Crocs Inc [2014] EWHC 987 (Ch)
» Resolution Chemicals v H Lundbeck A/S [2013] EWCA Civ 924
» Resolution Chemicals v H. Lundbeck A/S [2013] EWHC 739 (Pat)
» Regeneron Pharmaceuticals Inc and Bayer Pharma AG v Genentech Inc [2013] EWCA Civ 93
What the Directories Say
"He is really great with clients and is very solid, commercial and creative." "He is enormously bright and diligent, with a keen focus on client demands"
Chambers Directory (Intellectual Property) 2017
"He always makes time for the clients"
Legal 500 (Intellectual Property) 2016
"He's extremely busy and sought after by major pharmaceutical and technology companies." "A creative lateral thinker who approaches every case with huge commitment and enthusiasm"
Chambers Directory (Intellectual Property) 2016
"A very impressive and highly recommended senior junior, who adds gravitas"
Legal 500 (Intellectual Property) 2015
"Enormously bright and diligent, with a keen focus on client demands"
Chambers Directory (Intellectual Property) 2015
"Commercially sharp and user friendly"
Legal 500 (Intellectual Property) 2014
"Dynamic, easy to work with and completely on the ball."
Chambers Directory (Intellectual Property) 2014
Mark Chacksfield is "a phenomenal asset to his set." A barrister with a fine record on the most critical life sciences, pharmaceuticals and software patent cases, he is known for being "very creative and someone who sees all the angles in a case." In short, he is a "good strategic litigator."
Chambers Directory (Intellectual Property) 2013