Partner, Patent Attorney Southampton
Profile of Aylsa Williams

I’ve been a partner at D Young & Co since 2004 and I love working with such a dynamic team. Every day brings fresh technical and legal challenges and we’re always striving to find the best solutions for our clients.

I’m a European patent attorney and ADR Group accredited mediator, with a focus on life sciences. I have considerable experience before the EPO Opposition Divisions and Appeal Boards. As well as drafting specifications and advising on validity and infringement matters, I handle worldwide prosecution portfolios and provide strategic advice.

I’m also involved in Plant Bioscience’s landmark cases G2/07 and G2/13 before the Enlarged Board of Appeal. My work keeps me at the forefront of scientific technology, so I’ve been lucky enough to work with excellent, often award-winning scientists.

My portfolio covers the technical areas of biotechnology and biochemistry, including molecular biology, food technology, enzymology, plant biotechnology, antibody technology, diagnostics and therapeutics, stem cell technology and pharmaceuticals. It’s a diverse and ever-changing field – which means my role is equally varied and interesting.


  • BSc in Applied Biology, University of Leeds.
  • European Patent Attorney 2001.
  • Chartered Patent Attorney 2003.
  • ADR Group Accredited Mediator.
  • European Design Attorney.


  • Chartered Institute of Patent Attorneys (CIPA).
  • European Patent Institute (epi)
Aylsa Williams is a pillar of the biotechnology group and provides prosecution services for clients ranging from major blue-chips to domestic universities.
IAM Patent 1000
Distinguished member of the chemistry corps, Aylsa Williams leaves no stone unturned in the pursuit of international portfolio management perfection.
IAM Patent 1000
IP Star 2017.
IP Stars (Managing IP)
Aylsa is great at strategy and oppositions.
IP Stars (Managing IP)
Strategic sage Aylsa Williams has abundant experience before the EPO Opposition Divisions and Appeal Boards.
IAM Patent 1000
A great sense of the big picture.
Legal 500
Biotechnology ace Aylsa Williams also advises on oppositions as part of her wide-ranging portfolio management practice.
IAM Patent 1000
Good at interacting with clients.
Legal 500