Jason G. Sheasby

Jason Sheasby is a partner in the Los Angeles office of Irell & Manella, where his practice focuses on complex litigation, patents, trade secrets, antitrust, regulatory compliance and internal investigations. His experience spans a wide range of industries, including bio/pharmaceuticals, medical devices, semiconductors, telecommunications, electronics, universities, and health care. 

At the age of 37, Mr. Sheasby was appointed to a seat on the firm’s governing body, the Executive Committee, making him the youngest partner at Irell to hold this position. 

Mr. Sheasby is regularly selected for inclusion in industry honors lists. In 2013, Law360 named him a "Rising Star" and one of the nine IP lawyers under the age of 40 whose legal accomplishments belie their age. He is also consistently recognized as a Southern California Rising Star by Super Lawyers magazine and was listed in The Legal 500's profile of leading intellectual property litigation departments. 

Representative Litigation Matters:

• As lead counsel, he obtained a judgment that a licensee who had already paid in excess of $80 million in royalties had materially and intentionally breached the license by manipulating technical data, allowing his client to terminate the agreement and expose the licensee to patent infringement liability.  
• As co-lead counsel, he obtained a judgment that one of the leading semiconductor packaging manufacturers in the world infringed five of his client's patents. 
• Mr. Sheasby and other Irell attorneys took over after claim construction a patent infringement case brought by the Wisconsin Alumni Research Foundation against Intel’s most advanced computer microarchitecture.  Irell obtained summary judgment disposing of Intel’s defense that it had a license to the patent based on funding it provided to the University of Wisconsin, and received a revised claim construction that allowed WARF to defeat summary judgment of anticipation.  Intel settled the case three days before trial.
• As lead counsel for the patentee, the case settled three days before trial, and right after the judge affirmed the right of the patentee to seek in excess of $700 million in damages.

Representative Intellectual Property Matters:

• Mr. Sheasby has litigated patent infringement actions involving a diverse set of technologies, including genomics, polymer chemistry, antibody humanization, recombinant drug expression, fusion proteins, optics, computer microarchitecture, materials science, and semiconductor packaging. 

Representative Internal Investigations and Regulatory Compliance Matters:

• Mr. Sheasby has conducted internal investigations relating to improper use of laboratory funding, Health and Human Services regulatory compliance, theft of client trade secrets, and potential misuse of competitor trade secrets. 

While at Harvard Law School, Mr. Sheasby was a research assistant for Professor Arthur Miller and helped to revise Federal Practice & Procedure, the leading treatise on civil procedure.  

Mr. Sheasby is a frequent lecturer on intellectual property, including for the World Intellectual Property Organization and the National Association of College and University Attorneys.

Bar & Court Admissions

• California
• U.S. Court of Appeals, Federal Circuit
• U.S. District Court, Central and Northern Districts of California