IP Director, Patent Attorney
Life Sciences


Rhiannon specialises in patents in the biotechnology field, including biomedical cases relating to therapeutics, from early leads to developments of marketed therapeutics. As part of her European patent work, she represents clients in complex and multi-party opposition cases as defendant or opponent. Rhiannon is also a member of the firms’ SPC team.

Areas of Expertise

  • antibody production and development, especially relating to therapeutic antibodies
  • personalised therapies, especially cancer therapies
  • protein engineering
  • diagnostics
  • immunology and virology
  • patent term extension (PTE) and supplementary protection certificates (SPCs)


Rhiannon’s clients include US attorney clients, large European and US biotechnology firms and UK based research institutions.


Rhiannon has a degree in Natural Sciences from the University of Cambridge, with a particular focus on immunology and virology. She joined Mewburn Ellis LLP in 2011, qualifying as a Chartered Patent Attorney in 2014 and a European Patent Attorney in 2015. Rhiannon became a Patent Director in 2019.