The Legal 500

Twitter Logo Youtube Circle Icon LinkedIn Icon

J A Kemp

Work 020 3077 8600
Fax 020 7430 1000
Cambridge, London, Munich, Oxford, Paris

London: TMT (technology, media and telecoms)

PATMA: Patent attorneys
PATMA: Patent attorneys - ranked: tier 1

J A Kemp

J A Kemp demonstrates particular strength in the pharmaceutical, engineering and university sectors and is especially well known for its high-profile caseload acting for US and Japanese clients. EPO patent filings and oppositions account for a significant portion of the practice. The group's track record in successful patent restoration and its experience in supplementary protection certificates are other stand-out features. Engineering and IT practice head Michael Nicholls, chemistry and pharmaceutical practice head Celia Keen and biotechnology and life sciences practice head Patrick Campbell form the spine of the practice. Pharmaceutical and cleantech expert Ravi Srinivasan is another key practitioner. Patent and trade mark attorney and litigator Stephen Hodsdon joined in Cambridge from Mewburn Ellis LLP.

Practice head(s):Michael Nicholls; Celia Keen; Patrick Campbell

Other key lawyers:Ravi Srinivasan

Key Clients





Work highlights

  • Represented patent applicant AbbVie in EPO opposition regarding high-value rheumatoid arthritis drug upadacitinib.
  • Represented patent owner Almirall in EPO opposition brought by several generics companies regarding a dosage patent covering Aclidinium, a treatment for chronic obstructive pulmonary disorder.
  • Advised Actimed on developing the start-up's patent portfolio regarding the use of beta blockers in oncology.
  • Advised UCB on the management of a high volume of patent applications across three families regarding antibody rozanolixizumab, including key patent applications in the US, Europe and Japan, and successful defence of the client licensee against an opposition filed regarding a patent covering osteoporosis treatment antibody romosozumab, owned by Amgen and licensed to UCB.

[back to top]

PATMA: Trade mark attorneys
PATMA: Trade mark attorneys - ranked: tier 1

J A Kemp

J A Kemp's caseload increasingly contains trade mark prosecution for major pharmaceutical and medical device, especially medtech, clients, as part of an overall sectorially diverse portfolio. In addition to a busy drafting and filing practice, the team assists a string of major international players, often longstanding clients of the firm, with opposition proceedings and appeals. James Fish, dual-qualified as a European trade mark attorney and solicitor, heads the practice from the London office. In Cambridge, litigator and patent and trade mark attorney Stephen Hodsdon joined from Mewburn Ellis LLP, while Aaron Newell, a UK- and Australian-qualified solicitor, Canadian-qualified barrister and solicitor, and Australian-qualified trade mark attorney, joined the London office from Lewis Silkin LLP.

Practice head(s):James Fish

Other key lawyers:Tom Albertini; Ben Mooneapillay

Key Clients


Work highlights

  • Advised Diversey, Inc.. on the management of its trade mark portfolio outside the US and Canada, involving 5,000 trade mark registrations and applications covering a broad variety of sectors.

[back to top]

Further information on J A Kemp

Please choose from this list to view details of what we say about J A Kemp in other jurisdictions.


Offices in London

Legal Developments in the UK

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to