Tonia A. O'Connor

Tonia A. O'Connor is a patent litigation attorney serving as Counsel at Kirkland & Ellis LLP, where her practice includes representing clients in complex intellectual property disputes. Her work at the firm has involved significant litigation in the medical device sector.

O'Connor has primarily represented defendants in patent infringement matters. Her tracked experience includes serving as counsel for Abbott Laboratories in the multi-faceted patent infringement lawsuit, Miracor Medical SA v. Abbott Laboratories, concerning patents related to left ventricular assist devices (LVADs) and systems. This high-stakes litigation involves technology central to mechanical circulatory support, where Miracor Medical SA has asserted multiple patents against Abbott's HeartMate 3 LVAD system.

In connection with the Miracor Medical SA litigation, Abbott Laboratories, represented by Kirkland & Ellis, has also engaged in parallel inter partes review (IPR) proceedings before the Patent Trial and Appeal Board (PTAB) challenging the asserted patents. A partial stay of the district court proceedings was granted pending the outcome of these IPRs. One IPR proceeding (IPR2025-00116) initiated by Abbott Laboratories against a Miracor patent resulted in a Final Written Decision finding the challenged patent claims patentable.

Kirkland & Ellis is widely recognized for its robust patent litigation practice, representing clients in a broad range of technology sectors, including life sciences, before various forums such as district courts, the U.S. Court of Appeals for the Federal Circuit, the International Trade Commission (ITC), and the PTAB. Specific details regarding Tonia A. O'Connor's individual education, bar admissions, or other notable trial outcomes beyond the Miracor case are not reliably sourced at this time.