Leythem Wall is a European and UK patent attorney and litigator specialising in the chemical, consumer products, energy, material, mechanical, medical and pharmaceutical sectors. Prior to founding Oxon IP, he was a Partner in major European and US Intellectual Property law firms, and before then in-house patent counsel for ExxonMobil and AkzoNobel. He has extensive experience in patent drafting, prosecution and particularly oppositions before the European Patent Office. Having worked in private practice and industry for European and US companies, he has significant knowledge of the US patent system, and how this compares with Europe.