Joseph S. Grinstein

Analyst Summary: Joseph S. Grinstein (as of May 1, 2026)

Joseph S. Grinstein is a partner at the trial boutique Susman Godfrey LLP, where he focuses on high-stakes patent and intellectual property litigation. His practice centers on complex, high-technology disputes, with representative matters involving wireless networks, Wi-Fi technologies, self-driving cars, and specialized computer memory.

Based on tracked cases and publicly announced verdicts, Grinstein has a notable record representing plaintiffs in patent infringement actions. The provided data shows an even split between plaintiff and defendant-side work, though his most prominent reported results are plaintiff-side jury verdicts. These include securing a $166.3 million verdict for Finesse Wireless against AT&T and Nokia, and a separate $37.5 million verdict for Atlas Global Technologies against TP-Link in 2023. In the tracked case list, he represented the plaintiff Fractus, S.A., a pioneer in internal antenna technology, in its suit against TCL. He is also listed as lead counsel for the defendant, Visa Inc., in litigation brought by Cortex MCP over patents related to mobile-wallet payment platforms.

Grinstein’s practice includes proceedings before the Patent Trial and Appeal Board (PTAB). In the Visa v. Cortex matter, his client Visa has petitioned for inter partes review of the patents asserted in the district court litigation.

Grinstein has been with Susman Godfrey for his entire patent litigation career. He earned his law degree from Yale Law School, where he was Managing Editor of the Yale Law Journal, and graduated summa cum laude from Rice University. After law school, he clerked for Judge Patrick E. Higginbotham of the U.S. Court of Appeals for the Fifth Circuit.