At van Rooy is Chair of the Board and a Director in the firm’s Patent Department. He has a BSc Chemistry and Biochemistry from North-West University and B Proc from UNISA. He was admitted as an attorney to the High Court of South Africa in 1995 and registered as a patent attorney in 1998.

At has more than 30 years’ experience in specialist intellectual property law litigation and has successfully represented a wide range of international clients in patent and copyright litigation up to the Supreme Court of Appeal and the Constitutional Court of South Africa (https://collections.concourt.org.za/handle/20.500.12144/36586). He has extensive experience in patent, design and copyright litigation, plant breeders’ rights and GMO litigation, Anton Piller type proceedings, pharmaceutical, agrochemical and veterinary product liability litigation and related regulatory matters, patent filing and prosecution in a broad variety of jurisdictions and fields of technology.

His technical expertise includes life sciences, pharmaceuticals, veterinary sciences, agrochemicals, medical sciences, chemistry, biotech, biochemical sciences, microbiological sciences, plant breeders’ rights and genetically modified organisms, product liability and mitigation of risk and damages, copyright litigation, IP licensing contracts and registered designs. At has successfully presented at several IP workshops at Universities and numerous conferences over the past 25 years. He has also authored and co-authored various Chapters and articles for both local and international publications.