Rabicoff Law

Rabicoff Law: A Prolific Plaintiff-Side Patent Enforcement Boutique

Firm Overview
Rabicoff Law LLC is an intellectual property and business litigation boutique based in Chicago, Illinois. The firm was founded by Isaac Rabicoff and has established a national presence, leading patent cases in popular patent litigation venues such as the Eastern District of Texas and the Northern District of California. While the firm is not ranked in the AmLaw 200 or by Chambers and Partners, it has been recognized in legal industry reports for its high volume of patent litigation filings. A 2023 Lex Machina report identified Rabicoff Law as the second most active firm representing plaintiffs in patent cases from 2020 to 2022, with 677 cases filed. In 2017, the firm was also named one of Lex Machina's top three most active patent litigation firms.

IP Litigation Specialty and Side Preference
The firm's patent litigation practice is exclusively focused on representing plaintiffs, a fact supported by its record of asserting patents on behalf of non-practicing entities (NPEs) and other patent owners. The provided case list shows the firm acting as lead counsel for plaintiffs in all nine tracked matters. Rabicoff Law's enforcement efforts span various technology areas, with cases involving signal processing and radio frequency module technology for clients like ContentNexus LLC and Modulus Systems LLC. The firm's website states it has led licensing and enforcement campaigns against major technology companies including Amazon, Apple, Google, Samsung, and T-Mobile.

Notable Cases and Professional Conduct
Rabicoff Law is known for representing high-volume plaintiffs, including entities such as Authentixx LLC, ContentNexus LLC, and Modulus Systems LLC, primarily in the Eastern District of Texas. The firm's principal, Isaac Rabicoff, has been recognized as one of the most active individual patent litigation attorneys on the plaintiff's side. It is important to note that Isaac Rabicoff has also faced court sanctions and a public reprimand from the Virginia State Bar for professional misconduct related to his litigation practices in the Northern District of California, including filing numerous cases without proper admission and making frivolous arguments.

PTAB Practice and Key Partners
In addition to its district court litigation practice, Rabicoff Law represents patent owners in post-grant proceedings before the Patent Trial and Appeal Board (PTAB). The firm's website indicates it has successfully defeated the institution of multiple inter partes review (IPR) and covered business method (CBM) review petitions filed by entities such as Mastercard, Adobe, and RPX Corporation. The key attorneys identified in the firm's litigation are Isaac Phillip Rabicoff, the firm's founder, and Zachary H. Rabicoff. Isaac Rabicoff is a registered patent attorney and has argued before the U.S. Court of Appeals for the Federal Circuit.