Philadelphia: 215.965.1257 F: 215.965.1331 E: email@example.com
Philip L. Hirschhorn focuses his practice on patent litigation and counseling. He prides himself on working with clients to understand their businesses thoroughly, including the ways in which intellectual property litigation affects their business objectives. Clients can rest assured that Phil will go the extra mile, both on his own and as part of a team, to help clients solve their legal challenges.
Phil’s extensive experience, spanning more than 30 years, includes bench trials, jury trials, and arbitrations. He has represented clients in traditional infringement/validity litigations as well as Hatch-Waxman (Paragraph IV) litigations. Phil also has experience handling copyright, trademark/trade dress, and trade secret litigation. Phil advises clients on commercial patent licensing agreements. The subject matter of these engagements is diverse, including chemical, pharmaceutical, consumer products, medical devices, graphics, visualization technologies, apparel, and radiotherapy software and devices.
In addition to his patent litigation experience, Phil counsels clients on the interplay between the U.S. Patent and Trademark Office’s Patent Trial and Appeal Board (PTAB) and district court actions. He has extensive PTAB litigation experience, having assisted both patent owners and petitioners.
Phil’s prowess in intellectual property law has earned him many accolades over the years. Managing Intellectual Property has named him an IP Star nearly every year since 2013, and he has been named among IAM’s Patent 1000 list several times. He also has been named a New York Super Lawyer in the practice area of patent litigation.
Phil earned a bachelor’s degree from Columbia College and his law degree from Fordham University School of Law, where he also served as Associate Editor of the Fordham Law Review and Editor of the Fordham Environmental Law Report.
Phil is a frequent speaker on IP litigation topics such as recent developments in Paragraph IV litigation, patent damages, and trade secret litigation. He is a current Co-Chair of the PTAB/TTAB committee of the Federal Circuit Bar Association and the immediate past chair of the Patents Committee of the New York City Bar Association.
Representative litigation experience includes:
Representative International Trade Commission experience includes:
Phil’s representative PTAB experience includes:
Panitch Schwarze Partner to Discuss Data Challenges at Global Series Program // April 9, 2021
Panitch Schwarze Belisario & Nadel LLP partner Philip L. Hirschhorn will participate in a program entitled ‘The Data Challenges: Collection, Enterprise, Governance’ at the Federal Circuit Bar Association virtual global series. Read more
Panitch Schwarze Attorneys Named Among Top Lateral Hires of 2020 // March 15, 2021
Panitch Schwarze Belisario & Nadel LLP attorneys Erin M. Dunston, Philip L. Hirschhorn, Aaron L.J. Pereira, Dr. Travis W. Bliss, and Dr. Stephany G. Small are featured in The Legal Intelligencer’s ‘Top Lateral Hires of 2020’. Read more
Duncan Parking as a Case Study in Avoiding DOE Infringement, Leveraging Claim Construction and Joint Inventorship at the PTAB and in Federal Court // February 25, 2021
Panitch attorneys Philip L. Hirschhorn and Aaron L.J. Pereira use the Federal Circuit’s 2019 decision in Duncan Parking Techs. v. IPS Group as a vehicle to discuss established and emerging patent law issues in joint inventorship, doctrine of equivalents infringement, claim construction, and case management strategies. Read more
Panitch Schwarze Attorneys to Present at Intellectual Property Law (CLE), Live Webcast // December 16, 2020
Panitch Schwarze partner Philip L. Hirschhorn and attorney Aaron L.J. Pereira will present at an Intellectual Property Law CLE webcast presented by The Knowledge Group. Read more
Panitch Schwarze Partners to Present at The IP Strategy Virtual Summit // November 3, 2020
Erin M. Dunston and Philip L. Hirschhorn will take part in a virtual summit that discusses how patent practitioners build a cohesive strategy with options around these legal and budget challenges. Read more
Panitch Schwarze Partner Philip L. Hirschhorn Discusses Moving to a New Firm During a Global Pandemic // October 30, 2020
Partner Philip L. Hirschhorn recently spoke with Managing IP, a leading source of news and insight into global intellectual property trends and topics, about making a lateral move during the ongoing pandemic of novel coronavirus. Read more
Panitch Schwarze Partners Named Among 2020 ‘IP Stars’ and IAM Patent 1000 // July 9, 2020
Panitch Schwarze Belisario & Nadel LLP is pleased to announce that Managing Intellectual Property has named intellectual property attorneys Erin M. Dunston and Philip L. Hirschhorn 2020 IP Stars. Dunston and Hirschhorn were also recently named part of the IAM Patent 1000 for litigation – Dunston for the D.C. Metro Area and Hirschhorn for New York. Dunston was also ranked nationally for post-grant proceedings. Read more
Panitch Schwarze Team to Discuss Hatch-Waxman Disputes in District Court and at the PTAB // June 29, 2020
Panitch Schwarze partners Travis W. Bliss, Erin M. Dunston, and Philip L. Hirschhorn and Panitch Schwarze counsel Aaron Pereira are teaming up to present a webinar for Lawline on the interplay between district court and PTAB practice, including strategic considerations and recent developments. Read more
Panitch Schwarze Partner to Discuss Global IP Issues at Federal Circuit Bar Association Bench & Bar // May 14, 2020
Panitch Schwarze partner, Philip L. Hirschhorn, joins a panel of fellow thought leaders at the Innovation and Incentive Systems webinar to discuss the types of incentives (and disincentives) that exist in the Global IP community and their impact on innovation. Read more
Panitch Schwarze Lands Powerhouse IP Litigation and Life Sciences Group // April 10, 2020
Panitch Schwarze Belisario & Nadel has expanded its IP life sciences and litigation practices by adding a formidable group of patent litigators and prosecutors. Read more
When not in the office, Phil enjoys spending time traveling and actively exploring new places, like a hike in the Rockies, skiing in Utah, walking on the Great Wall of China, or riding a bike through Paris.