Kathleen C. Galleher

Kathleen C. Galleher is a patent litigation and prosecution attorney at Finnegan, Henderson, Farabow, Garrett, & Dunner. Her practice spans the mechanical and electrical arts, encompassing a range of technologies including water treatment, sporting goods, consumer products, cybersecurity, financial services, business systems, and medical devices. Prior to her legal career, Ms. Galleher gained practical experience as an engineer in the construction industry, specializing in mechanical, electrical, and plumbing systems.

Ms. Galleher primarily represents patent owners in litigation. Her experience includes a tracked appearance on the plaintiff side as Counsel in Google LLC v. Headwater Research LLC, a case involving mobile device communication technology and push notification systems. This particular case concluded with a confidential settlement or negotiated license agreement in February 2026, indicated by the cancellation of a scheduled Markman hearing. She also represents Aerin Medical Inc. and The Foundry, LLC in patent infringement litigation concerning medical devices.

Her practice also involves significant experience with Patent Trial and Appeal Board (PTAB) proceedings. Ms. Galleher represents patent owners in inter partes review (IPR) challenges related to asserted patents, such as those involved in the Aerin Medical case. She has also contributed to legal publications on topics including IPR estoppel and the application of collateral estoppel between district courts and the PTAB.

Ms. Galleher is admitted to practice in Virginia and before the U.S. Patent and Trademark Office.