Alex Piésold



Alex is a UK and European Patent Attorney. He joined Dehns in 1982, having graduated from the University of Bristol with a BSc (Hons) in civil engineering. He became a Partner in 1993 and held the role of Senior Partner from 2015 – 2022.

Alex handles a variety of engineering related patent work. He is also a UK Chartered Trade Mark Attorney.

Type of clients and client work

Alex’s experience includes advising direct clients, such as universities, spin outs and multinationals, on developing their intellectual property and patent portfolios, and the creation and implementation of patent filing strategies.

Much of his work includes drafting and prosecuting patent applications, and providing advice on freedom to operate issues. He also handles European opposition work including the presentation of cases at opposition and appeal hearings.

In addition to his patent work, Alex also advises clients in relation to the protection of their designs.


Alex handles work in a number of engineering fields, including automotive engineering, fuel cells, ventilation appliances, fluid mechanics, gas separators, medical devices, pharmaceutical containers and packaging, construction and building technology, offshore structures, sub-sea electrical and optical connectors, and electro-osmotic pumps and mixers.

Qualifications and Memberships

  • UK Chartered Patent Attorney, 1987
  • European Patent Attorney, 1987
  • UK Chartered Trade Mark Attorney, 1990
  • Registered Trade Mark Agent, 1990
  • Fellow of the Chartered Institute of Patent Attorneys (CIPA)

Higher Education

BSc (Hons), University of Bristol, Civil Engineering, 1982


Alex is a regular visitor to Japan, providing a number of large Japanese clients with advice on UK and European patent and design practice. He also regularly attends the annual meeting of the Asian Patent Attorneys Association (APAA).

Alex provides advice to private inventors at patent clinics organised by the Chartered Institute of Patent Attorneys.

Alex was named as a “recommended” patent attorney in the 2017 and 2018 editions of Legal 500 and mentioned in the 2022 edition.

Senior Partner

Contact details

St Bride’s House
10 Salisbury Square
United Kingdom

+44 (0)20 7632 7200 +44 (0)20 7353 8895


mechanical engineering, designs