Tom Leanse

Associate, Patent Attorney

Tom is qualified as a European and UK patent attorney and has over ten years’ experience working in private practice for clients ranging from SMEs to multinationals, across all areas of chemistry. He has particular experience in small molecule pharmaceuticals, agrochemicals, and medical devices, as well as chemical technologies relevant to the electronics sector including organic light-emitting devices, liquid crystal displays, and secondary batteries. Tom also has an interest in sustainable technology and has worked with a number of cleantech firms in sectors such as biodegradable packaging for the food and drink industry and low emission vehicles.

Tom drafts, files and prosecutes UK and European patent applications, and handles large patent families across many countries. He also provides advice on freedom to operate and validity, and represents clients in oppositions and appeals before the European Patent Office.

He first joined J A Kemp in 2008 before leaving in 2015 to work elsewhere in private practice. Tom re-joined J A Kemp in 2019 as an associate.




University of Durham, Honours Degree in Chemistry

Professional Qualifications

European Patent Attorney; UK Chartered Patent Attorney

Membership of Professional Bodies

Fellow of the Chartered Institute of Patent Attorneys (CIPA); Member of the Institute of Professional Representatives before the European Patent Office (EPI)



Tel: +44 20 3077 8600

14 South Square,
Gray’s Inn

Contact Tom

If you wish to talk to Tom Leanse, please send an email directly to

or call +44 20 3077 8600

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