Jason Sheasby

Jason Sheasby is a partner at Irell & Manella LLP, where he has practiced for over two decades. His national trial practice focuses on high-stakes, complex patent litigation for plaintiffs. While the provided case list tracks a single appearance for Zepp North America, public records and news reports show a consistent pattern of representing patent owners in enforcement actions, which aligns with the plaintiff-side focus noted in the authoritative data.

Sheasby's practice spans a wide array of complex technologies, including telecommunications (4G/5G standards), semiconductors, computer memory, software, and life sciences. He has served as lead or co-lead counsel in numerous cases resulting in nine- and ten-figure verdicts for his clients. Notable plaintiff-side outcomes include securing a $500 million verdict for PanOptis against Apple, more than $300 million for USAA against Wells Fargo in litigation over mobile check deposit technology, and a $400 million verdict for KAIST against Samsung concerning FinFET semiconductor technology. He was also co-lead counsel for Netlist in a case that resulted in a significant damage award from Samsung for infringement of computer memory patents.

In addition to his district court trial work, Sheasby is frequently retained for post-grant proceedings before the Patent Trial and Appeal Board (PTAB). His firm biography notes extensive experience in inter partes review (IPR) challenges across various industries, including a perfect record in one series of IPRs and successful defenses of patents that protected hundreds of millions in royalty payments.

Sheasby earned his J.D., cum laude, from Harvard Law School in 1999 and a B.A. from Pomona College, where he now serves on the board of trustees.