Mark Chacksfield KC

Mark is a highly regarded silk with an outstanding reputation in complex pharmaceutical, biopharmaceutical and telecoms patent actions, but also attracting a loyal following across the entire range of IP and media cases. He is praised for his deep understanding of the law, innovative and inventive mind, and his impressive work ethic.

Mark has a preeminent reputation in multijurisdictional FRAND litigation, having acted in virtually all of the leading UK FRAND actions, including InterDigital v Lenovo, Nokia v Oppo, Amazon v Alcatel, Asus v Nokia, Optis v Apple, Unwired Planet v Huawei, as well as the jurisdictionally important pair of Kigen and Vestel. He recently appeared in the Supreme Court on the potentially revolutionary Emotional Perception AI case, and has been credited with the original creation of the Arrow declaration.  In the pharmaceutical/biopharmaceutical field Mark has litigated many of the world’s largest blockbuster products, including FKB v. AbbVie (adalimumab), Pfizer v Roche (bevacizumab), Actavis v Icos (tadalafil), Lilly v Genentech (IL-17A/F), and Hospira v. Genentech (trastuzumab); as well as related SPC cases.

Additionally Mark represents broadcasters, record companies, picture libraries and well-known personalities in copyright/privacy claims, as well as acting in musical copyright actions concerning substantial hits.

Called 1999, Middle Temple.

IPBA; Chancery Bar Association.

Royal Grammar School, High Wycombe; Clare College, Cambridge: BA (Double First) Natural Sciences (Zoology), Hurst Prize for Zoology. Called 1999. Silk 2019.