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Fax 020 7353 8895
Brighton, London, Manchester, Munich, Oxford

Hanna Dzieglewska


Work Department

Patents - Biotechnology


Head of Biotechnology, Partner



Hanna Dzieglewska joined the firm in 1987 and became a partner in 1995. After obtaining her First Class Honours Degree in Biochemistry specialising in Neurochemistry, Hanna went on to obtain a PhD in Biochemistry, focusing primarily on enzymology, protein purification, and microbial physiology.

Hanna is Head of the Dehns Biotechnology team.


Type of clients and client work 

Hanna's clients include small-to-medium-sized companies or sole inventors, as well as larger companies. Her work includes all aspects of patent portfolio management worldwide and she has extensive experience of working directly and closely with inventors to identify patentable inventions and draft patent specifications, including helping to guide patent-focused research.  She has particular experience in developing patent portfolios and IP strategies for her clients, and providing them with robust advice throughout their commercial development process. This includes all aspects of the patent prosecution process, including EPO and foreign patent prosecution, and opposition work at the EPO.

Hanna's work also includes advising clients in a number of areas including freedom to operate, evaluating patent portfolios and due diligence.



Since joining the firm, Hanna has worked in many technical areas of biochemistry/biotechnology including a variety of therapeutics and diagnostics, genetic engineering, and industrial biotech processes. Particular areas include antibody and cell-based therapies, aspects of immunology generally, peptide therapeutics, recombinant protein expression, transgenic organisms,  vaccines, vectors, biological purifications and separations, nucleic acid manipulations and assays (including isolation, sequencing, amplification, detection, genomic and expression analysis etc), cells (e.g. cell culture, isolation, manipulation, assays etc) and also in related areas such as medical uses of known compounds.


  • UK Registered Patent Attorney, 1991
  • European Patent Attorney, 1992
  • Registered Trade Mark Agent, 1991
  • Fellow of the Chartered Institute of Patent Attorneys


PhD, University of Kent, Biochemistry, 1987

BSc Hons (First Class), Imperial College, Biochemistry, 1984

London: TMT (technology, media and telecoms)

PATMA: Patent attorneys

Within: PATMA: Patent attorneys

Dehns is one of the most established firms in the market and stands out especially through its prolific patent filing practice, both at the UKIPO and at the EPO. The group is also very experienced in opposition and appeal work and counts a high number of major British, Scandinavian (especially Norwegian), and US corporations among its longstanding clients. Senior partner Alexander Piésold and biotechnology practice head Hanna Dzieglewska, both in London; head of chemical Philip Towler in Oxford; and engineering practice head John Tothill in Brighton are key practitioners. Brighton's Philip Jeffrey, Deborah Owen and Oxford-based senior associate Mark Bell are also recommended. Oxford's Tim Wilson made partner. The firm also has offices in Bristol, Manchester and Sandwich as well as an international office in Munich.

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