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  • UK

Marks & Clerk Solicitors


  • 90 Long Acre
  • London
  • UK
  • WC2E 9RA

Intellectual Property - London (Firms)

Basic facts about the department
- 7 partners
- 16 other lawyers

What the team is known for A high-quality IP boutique, probably best known for its handling of patent litigation in the life sciences and electronics fields. Also a leader in soft IP and designs disputes.

Strengths (Quotes mainly from clients)

"Throughout we had sound, practical advice and guidance from them."

"The firm as a whole has a lot of support available - all the junior associates seem very switched-on and up to speed."

Work highlights Acted for Virgin Media and TiVo in a series of patent disputes with Rovi concerning patents for electronic programme guides and digital television and video functions.

Represented Genentech in a patent infringement case against Hospira UK regarding patents for the client's breast cancer treatment Herceptin.

Notable practitioners  

William Cook is an all-round patent lawyer, instructed for litigation and commercial mandates. He is best known for his work in the TMT sector, and also advises on related competition law issues. 

Mike Gilbert is seen by sources as a leading patent litigator with particular regard to life sciences and is also frequently called on to handle transactions in the sector. Sources say he is a "pleasure to work with."

Gregor Grant is a seasoned patent litigator with over 30 years of experience handling IP disputes. He is strong on all manner of cases, although he is best known for life sciences matters.

Significant clients Budějovický Budvar, Daiichi Sankyo, Genentech, MedImmune, SanDisk.

Life Sciences - UK-wide

What the team is known for Enters the rankings on the strength of an ever-growing reputation for excellence in patent litigation, especially on behalf of some of the world's most dynamic biotech companies.

Strengths (Quotes mainly from clients)
"One of the strongest biotech practices."

"An excellent boutique." 

Work highlights Acted for Genentech in patent litigation at the High Court and the Court of Appeal against Bayer and Regeneron concerning the client's VEGF antagonist drugs used to treat cancer and diseases that can result in blindness.

Represented Occlutech in a patent dispute with AGA Medical concerning cardiological occluders. 

Notable practitioners  

Mike Gilbert is recommended for his prowess in handling biotech, medical device and pharmaceutical patent litigation. Sources highlight his pragmatism and team-leading skills in testing circumstances.

Significant clients Daiichi Sankyo, Genentech, MedImmune.