Caelia’s over 20 years’ experience in the patent profession is grounded in her strong technical background.  Following her physics degree at Oxford, Caelia went on to research her doctorate by studying magnetic interactions at low temperatures.  Caelia’s patent portfolio has evolved to reflect her passion for physics, and covers a range of technologies including aeronautics and aerospace, energy and power management, cooling systems, telecoms, thin film technology, and software.

From strategic drafting to focused prosecution, Caelia’s extensive experience enables her to provide clear, commercially astute advice throughout every stage of the patenting process.  Caelia specialises in contentious post grant proceedings, with her considerable knowledge in this area leading to a reputation for successfully defending patents in EPO opposition and appeals work.  
Caelia enjoys advising a diverse client base that encompasses multinational companies, university spin outs, and direct clients. For all of these, Caelia’s emphasis is upon developing IP strategies that allow clients maximise their existing and potential IP assets in the context of their business needs.
Caelia chairs the Chartered Institute of Patent Attorney’s Professional Development Working Group, and is also a member of its Steering Committee, Educational Committee, and UPC Task Force, as well as IP Ability.

Newly promoted partner Caelia Bryn-Jacobsen has 25 years’ experience in the patent profession. A physics and tech expert with a strong reputation at the EPO, she deftly manages portfolios for femcare innovator Daye Limited, e-commerce disrupter Ubamarket, and supports the team for LG Display. Her contentious expertise was on display in her deflection of an EPO opposition launched by EOS GmbH against aerospace giant Boeing. - IAM Patent 1000, 2023


European Patent Attorney (2003)
UK Chartered UK Patent Attorney (2002)
IP Litigator - Patent
Representative before the Unified Patent Court (UPC) (2023)
MSc - Queen Mary London (1998)
DPhil - University of Oxford (1997)
MA Hons - Physics, University of Oxford (1994)


​Chartered Institute of Patent Attorneys (CIPA)
The Institute of Professional Representatives before the European Patent Office (EPI)
Institute of Physics (IOP)
IP Ability Committee
IP Inclusive Advisory Board Member
Chair of CIPA’s Professional Development and Working Group
CIPA Council Member