Phil Jeffrey



Phil is a Chartered UK Patent Attorney and European Patent Attorney with a First Class Honours degree in Physics and a PhD in laser physics and photorefractive materials. He joined Dehns in 1994 and became a Partner in 2002.



Phil is an experienced patent attorney with technical expertise across a wide range of high-technology physics and engineering fields including photonics, holography, optoelectronics, mass spectrometry, oil drilling and exploration, medical devices, nanotechnology, optical communication systems, endoscopes and aerosol provision devices.

Phil acts for several major corporations including BAT and FUJIFILM. He provides patentability, infringement, validity and other strategic advice and is a patent drafting, patent prosecution and registered designs expert with a high allowance rate.

He is recognised by IAM300 as being particularly experienced in IP strategy and he enjoys helping start-ups and SMEs develop and execute an IP strategy which seeks to increase VC investability.

Phil is a Business Development partner and is a regular visitor to the US, Japan and China.


Qualifications and Memberships

  • UK Chartered Patent Attorney, 1999
  • Professional Representative before EUIPO, 1999
  • European Patent Attorney, 1998
  • Certificate in IP Law, University of London, 1995
  • Fellow of the Chartered Institute of Patent Attorneys
  • European Patent Institute


Higher Education

PhD, Southampton University, “Holographic Information Processing”, 1994

BSc Hons (First Class), Southampton University, Physics, 1991


“UK Patent Box Proposals”, Intellectual Property Magazine, June 2010. Click here to read article.


“Evolution of IP practices and the emergence of new business models for IP firms” MIP Global IP & Innovation Summit, Shanghai

“UK and European IP Developments”, Houston Intellectual Property Law Association Annual Conference, Houston

“Recent Developments in European Practice”, Houston Intellectual Property Law Association Annual Conference, Houston



Phil was recognised in the 2018, 2019, 2020, 2021 and 2022 editions of IAM Strategy 300 – The World’s Leading IP Strategists, which identifies those “shown to possess world-class skills in the development and roll-out of strategies that maximise the value of patents, copyright, trademarks and other IP rights”. He was also recommended in the 2020 edition of The Legal 500 directory.

Phil is also a sub-4 hour marathon runner.

Contact details

The Brinell Building
30 Station Street
United Kingdom

+44 (0)1273 244 200


mechanical engineering, physics, designs