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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

According to one client, 'the quality of advice at Dehns is outstanding' and the team is 'very effective at patent prosecution and invalidation attack and defence'. Leading the team is Alexander Piésold, Hanna Dzieglewska (head of biotechnology), Philip Towler (head of the chemical group), and John Tothill (head of engineering). Other key figures include Mark Bell, who worked with the US lighting products company Cree on its European patent applications and Laura Ramsay, who assisted Isansys Lifecar with the granting of a patent for its wireless cardiac monitoring device 'Lifetouch Sensor'. Patent portfolio management is a key specialty of Chris Goddard, who recently worked with Camurus on its portfolio. Matthew Hall and Adam Taylor conducted due diligence for EQT on the IP portfolio of its target company AutoStore. Associate Daniel Rowe drafted and filed the patent application for a test kit which measures bacteria and is used to detect bowel conditions. Alex Robinson, Barbara Rigby, Christopher Wilkins and Phillip Price are also recommended.

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