Patrick is an intellectual property lawyer with specialist expertise in the pharmaceutical and biotechnology fields.

Patrick is a Partner in the international intellectual property group of Bird & Bird, based in London.

His primary specialism is in litigation and advice in the area of pharmaceuticals & biotechnology with UK and pan-European cases including Kirin-Amgen v TKT, Mylan v Novartis, Regeneron v Genentech, Gilead v AbbVie, Sarepta Therapeutics v Biomarin.

Patrick’s work also involves the preparation of validity, infringement and ‘freedom to operate’ opinions in a variety of technical fields particularly pharma/biotech and in advising companies on strategies for protecting their intellectual property rights. He works regularly with Bird & Bird European colleagues co-ordinating pan-European patent litigation strategies.

He has a degree in Natural Sciences from Trinity College Dublin and a Masters in Intellectual Property law from Queen Mary, University of London.

Patrick speaks and writes regularly on Intellectual Property issues. He is an associate member of the Chartered Institute of Patent Attorneys and Bird & Bird’s representative at the Intellectual Property Lawyers Association.

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Lawyer Testimonials
  1. IAM Patent 1000 2018

    "The "seriously experienced" Kelleher has faced off against some of the most feared litigators around and emerged victorious"
  2. "A slick combination of multi-jurisdictional management skills and expert legal knowledge has also earned Patrick Kelleher praise in the biotechnology arena."

    IAM Patent 1000 2017
  3. "Patrick Kelleher streamlined approach to litigation makes him a favourite of small and medium-sized in particular"

    IAM Patent 1000 2014