PHILADELPHIA (June 2025) – Panitch Schwarze Belisario & Nadel LLP is pleased to announce that intellectual property attorneys Martin G. Belisario, Travis W. Bliss, Ph.D., Dennis J. Butler, Erin M. Dunston, Philip L. Hirschhorn, and Keith A. Jones have been included in the 2025 IAM Patent 1000, a guide to firms and attorneys deemed outstanding in the field of patent law. The firm was ranked among the top firms nationwide and in Pennsylvania and Delaware for its work in patent prosecution, IP litigation and transactions.
Belisario assists clients in nearly all aspects of intellectual property law, including patent and trademark procurement; trade secret protection; development and implementation of IP licensing and monetization strategies; advice and opinions relating to issues of patentability, freedom to operate, and infringement; and challenging, defending, and enforcing IP rights in litigations in court and before the U.S. Patent and Trademark Office (USPTO).
Bliss takes an approach to intellectual property law that seeks to assist clients throughout the entire IP process, from strategy development, counseling, and opinions; to procurement of appropriate IP rights (patents, trademarks, trade secrets); to monetization of those assets through development and implementation of effective IP licensing strategies; and, finally, to enforcing, defending, and challenging IP rights through litigations in court and before the USPTO.
Butler works with innovators to protect their new developments and enforce their existing intellectual property rights. He has specific experience helping medical device inventors protect their inventions at the US Patent Office and international patent offices, as well as defending against and enforcing intellectual property rights in US Courts, particularly the United States District Court for the District of Delaware and the Eastern District of Pennsylvania.
Dunston focuses her practice on patent procurement, opinions, enforcement (both in district courts and before the Patent Trial and Appeal Board), and portfolio strategy. Her matters are primarily in the life science space (small molecules, large molecules, and medical devices), but she has handled projects on subject matter ranging from precipitated silica to vaccines to radiotherapy devices.
Hirschhorn is an experienced trial lawyer specializing in patent litigation and other intellectual property proceedings, including post-grant proceedings before the PTAB. His extensive experience, spanning more than 30 years, includes bench trials, jury trials, PTAB proceedings, and arbitrations.
Jones focuses his practice on intellectual property and technology litigation, including patent, copyright, trademark, unfair competition, and trade secret cases in Federal District Courts across the country and at the U.S. Court of Appeals for the Federal Circuit. He also assists clients in Inter Partes Review proceedings before the PTAB, in trademark cancellation proceedings before the Trademark Trial and Appeal Board, and with patent applications before the USPTO.
The IAM Patent 1000 is commonly regarded as the definitive ‘go-to’ resource for those seeking to identify world-class, private practice patent expertise and leading expert witnesses in the US. The 2025 rankings are the result of an exhaustive qualitative research project to identify outstanding firms and individuals across multiple jurisdictions. Firms and lawyers are ranked according to the following criteria: depth of knowledge, market presence, sophistication of work, and positive peer and client feedback.