Siddharth

Kusumakar

Partner

Thinks strategically and knows the important points to push and those to keep in reserve – He is unflappable, dependable and gives sound legal advice that helps to advance our business needs.”

IAM Patent 1000

Siddharth

Kusumakar

Partner

Thinks strategically and knows the important points to push and those to keep in reserve – He is unflappable, dependable and gives sound legal advice that helps to advance our business needs.”

IAM Patent 1000

Profile

Sidd specialises in multi-jurisdictional patent litigation in the medical devices, biotech and pharmaceutical fields. His scientific background provides him with a firm understanding of issues in complex technical disputes.  

Sidd has represented clients in litigation before the UK Patents Court, Court of Appeal and Supreme Court, as well as in EPO proceedings – and has successfully acted in some of the most high-profile patent cases to come before the UK courts in recent years, including in two landmark UK Supreme Court decisions (Warner-Lambert v Actavis and Regeneron v Kymab).  As a UPC legal representative, Sidd is currently also acting in some of the first cases to be brought in the UPC. 

Sidd has considerable experience of managing and coordinating pan-European litigation strategies and parallel US litigation.  He also advises on freedom to operate, regulatory issues and matters of confidential information. 

Sidd joined Powell Gilbert as an associate in 2012 and became a partner in 2019.

Key Cases:

  • Advanced Bionics v MED-EL (cochlear implants)
  • Cook Medical v Boston Scientific (haemostasis clips)
  • Edwards Lifesciences v Meril (transcatheter heart valves)
  • Regeneron v Kymab (antibodies / transgenic mice)
  • Abbott v Edwards Lifesciences (transcatheter mitral valve repair)
  • Warner-Lambert v Actavis & Others (pregabalin)
  • AIM Sport v Supponor (digital overlay systems)
  • Forty Seven v SSB (therapeutic antibodies)
  • Edwards Lifesciences v Boston Scientific (transcatheter heart valves)
  • Merck Sharp & Dohme v Royalty Pharma Collection Trust (DPP-IV inhibitors)
  • CompactGTL v Velocys (gas to liquid conversion) 
  • TCT v Ericsson (telecommunications / FRAND licensing)
  • Mölnlycke v BSN Medical (wound dressings)
  • HTC v Apple (smartphones)
Qualifications

2008 Solicitor (England & Wales)

2014 Solicitor Advocate (England & Wales) 

2023 Solicitor (Ireland)

2023 UPC Representative

Education

BSc (Microbiology and Immunology), McGill University (Canada)

MSc (Immunology), Imperial College London

Diploma in Intellectual Property Law and Practice, Oxford University

Connections & Networks

Member of EPLAW and LSLA

Awards & Recognition

Juve Patent – Recommended Individual, Patent Litigation UK

Legal 500 Key Lawyer

IAM Patent 1000 – UK Patent Litigation (Bronze Tier)

Who’s Who Legal – Patents

Managing IP’s IP Stars – Notable practitioner (2022), Rising Star (2019)

Additional Facts
Favourite place

In the sun, by the sea

Additional Facts
Proudest moment

When I got a Wordle on the second try

Additional Facts
If I wasn't a lawyer

International DJ, making music and travelling the world