Harry Bush


Since joining Carpmaels & Ransford in 2017, Harry has built up a wealth of patent experience through his work in the Pharmaceuticals and Chemistry & Materials teams. He has been involved with work in all aspects of the life span of a patent, from nascent stage drafting of new applications, to the enforcement of patents in global litigation actions, from due diligence projects to Europe‑wide SPC prosecution and strategy. Harry has accrued particular experience in the preparation and global prosecution of patent applications, when working for numerous UK-based companies, including working with inventors to draft NCE and new medical use applications for clinical candidates, and co-ordinating the case strategy to bring these applications to grant. He has also built up experience in EPO oppositions, having been part of teams working on patents relating to numerous marketed drugs.

Before joining Carpmaels, Harry studied Chemistry at Merton College, University of Oxford. He spent his final year at university researching Cytochrome P450 enzymes. He studied the oxidation of cyclic amine compounds at sites remote to the functional group using a library of P450 mutants. He manipulated and further mutated these enzymes in order to improve the selectivity for specific oxidised products for use in drug fragment libraries.

Harry has been the co-ordinator for Carpmaels’ involvement with the Social Mobility Foundation, and particularly the e-mentoring part of the Aspiring Professionals Programme, as well as being a mentor to three secondary school students since 2018. Carpmaels has a strong cohort of e-mentors and has hosted students on work placements. Harry and other mentors have also presented on panels relating to legal and science sector professions.

In his spare time, Harry enjoys perfecting his carving on the ski slopes (although he maintains that cruisy blues and spacious reds are by far more fun than anything else) and is a friend and fond patron of the Royal Opera House (although he claims to know next to nothing about ballet and opera). A good book, and a zip around the city on his bike, are a few of Harry’s other passions.


  • MChem (University of Oxford)
  • Chartered Patent Attorney
  • European Patent Attorney
  • CertIP Certificate in Intellectual Property Law
  • UPC Representative