Kirkland & Ellis LLP
Jeannie Heffernan is an experienced trial lawyer who leads Kirkland’s IP litigation practice in Texas. She has won more than a dozen patent infringement trials in federal district courts across the country and at the International Trade Commission, with victories affirmed at the Federal Circuit. She represents clients in a wide range of fields, including computer networking, telecommunications, cryptography, semiconductors, and medical devices. Jeannie has particular experience leading high-profile patent litigation matters in Texas, where she has won numerous defense verdicts.
Jeannie is nationally recognized for her work, including by Managing Intellectual Property, The Legal 500 United States and IAM Patent 1000. The Legal 500 noted that she “is especially effective at managing complex issues and directing her teams appropriately to ensure that everything is handled timely and correctly. As an individual lawyer, Mrs. Heffernan’s analytical skills and work ethic are top notch.” IAM has praised her work in Texas courts noting that she “knows how best to conduct patent trials in the Eastern District of Texas, no matter what the technology involved.” IAM also said she has as “much experience in the Eastern District of Texas as any national litigator and has managed to get some big wins on the defense side there in terms of arguing for the exclusion of the plaintiff’s damages expert. She’s great at interrogating experts and witnesses, and her follow-up questions are especially probing.”
In addition to leading high-stakes patent litigation cases, Jeannie represents clients in matters involving allegations of copyright and trademark infringement, trade secret misappropriation and breach of contract. Prior to launching Kirkland’s IP litigation practice in Texas, Jeannie spent 20 years in the Firm’s New York office.