Our Firm


Lief Parke LLP is committed to providing our clients with the highest caliber of intellectual property litigation and counseling in the most efficient manner possible. Innovation and Integrity is our guiding principle and the means by which we achieve those goals.


Our firm is built on a relationship spanning a quarter century. We first worked together in 1995 at an elite New York IP boutique that was litigating the patents covering Zantac®—then the world’s largest blockbuster medicine—and other critical inventions. In 2011, we worked together again at another prestigious New York IP firm. And now we have come full circle and founded our own firm—Lief Parke LLP.


Combined, we have 55 years of IP litigation and counseling experience—including patent, trademark, copyright, IP contract dispute, and trade secret cases in industries and technologies ranging from pharmaceutical and biotech to industrial equipment and medical products, among many others. We have tried many cases. We have won many cases. We understand science and law—and apply our deep understandings to advance our clients’ interests.


We also bring a critical eye to how other law firms handle cases and bill clients. We are not wedded to the billable-hour model. We explore fixed fees, contingent fees, success fees, and bespoke blends of those options to find what best suits each client. We relentlessly trim unnecessary costs, while maintaining  excellence. Like our clients, innovation is at the core of what we do.


Truly effective lawyering involves listening intently to clients, identifying their individualized issues and needs, and providing legal solutions to advance their objectives. We would be honored to represent you, advocate for you, and help further your success.