Daniel S. Leventhal

Daniel S. Leventhal is a prominent patent litigator at Norton Rose Fulbright US LLP, where he co-leads the firm's patent litigation team, splitting his time between the Houston and Austin offices. His practice primarily focuses on high-tech patent litigation, encompassing a broad range of technology sectors including general technology, life sciences, energy, and consumer markets.

Leventhal actively engages in Patent Trial and Appeal Board (PTAB) proceedings, handling Inter Partes Reviews (IPRs), Post-Grant Reviews (PGRs), and Covered Business Method (CBM) reviews. He represents both petitioners challenging patent validity and patent owners defending their intellectual property. Notable PTAB engagements include serving as back-up counsel for Unified Patents in Unified Patents PTAB Data v. Data Health Partners Inc, representing Patent Owner Smith Interface Technologies, LLC in IPRs against Apple Inc., and being part of the legal team for Qualcomm in IPR proceedings against FedEx.

His client roster includes major operating companies such as Qualcomm, AT&T, and Palo Alto Communications. Leventhal also contributes to Norton Rose Fulbright's "Patent Challenges" blog, offering insights on post-issuance proceedings at the USPTO. In 2012, he co-authored an article addressing the Federal Circuit's en banc decision on the "Joint Infringement" standard.

Daniel S. Leventhal is registered to practice before the U.S. Patent and Trademark Office, with registration number 59,576. Specific details regarding his law degree and state bar admissions are not reliably sourced in the context of his patent litigation practice.