Mark Berkowitz is a partner in the Firm’s Intellectual Property Practice with over 15 years of experience advising clients on a full range of intellectual property, e-commerce, and technology matters.
Leveraging his background in electrical engineering, Mark represents clients in patent litigation across a wide range of technologies, including consumer electronics, semiconductors, e-commerce, power distribution, and medical devices, among others.
Mark enforces and defends trademark, unfair competition, and false advertising claims. He has been lead counsel in more than 40 cases relating to the first-sale doctrine and is regularly called upon to defend the rights of merchants to resell branded goods.
A registered patent attorney, Mark prepares and prosecutes patent and trademark applications and participates in inter partes proceedings before the U.S. Patent and Trademark Office. Mark counsels clients with respect to a broad range of patent, trademark, and copyright matters and prepares opinions with respect to patentability, freedom-to-practice, infringement, and validity.
Mark represents numerous Amazon sellers and other e-commerce merchants in the cutting-edge intellectual property legal issues that they encounter, including those in Amazon’s Patent Evaluation Express Program and in arbitration against Amazon. He is particularly experienced guiding clients through rights owner complaints on major e-commerce platforms, such as Amazon. Mark also counsels clients on developing intellectual property portfolios that will provide the most value in an online world.
Before attending law school, he worked as an electrical engineer at a global defense firm, where he gained experience in circuit design, software development, and manufacturing.
- State University of New York at Stony Brook (B.S., magna cum laude)
- Electrical Engineering
- St. John’s University School of Law (J.D.)
- New York
- New Jersey
- U.S. District Court for the Southern District of New York
- U.S. District Court for the Eastern District of New York
- U.S. District Court for the District of New Jersey
- U.S. Court of Appeals for the Federal Circuit
- U.S. Supreme Court
- U.S. Patent and Trademark Office
- U.S. District Court for the Eastern District of Michigan
- U.S. District Court for the Northern District of Illinois
- U.S. District Court for the District of Colorado
- U.S. Court of Appeals for the Second Circuit
- U.S. Court of Appeals for the Seventh Circuit
- Hebrew
- Super Lawyers, 2021-2025
- Putting IP Muscle Behind Your Amazon Hustle,B-Tank Magazine, Feb. 2019
- Partnering With U.S. Customs to Protect Your IP Rights and Supply Chain, B-Tank Magazine, Nov. 2018
- Non-Disclosure and Confidentiality Agreements: Securing a Business’s Intangible Assets Under Legal Lock and Key, Sept. 2018
- Trademark Demystified,B-Tank Magazine, May 2018
- Evidence in Patent Cases, Chapter: General Provisions,American Intellectual Property Law Association, 2018

