Regina Won is an associate in the firm's Litigation department. Her practice focuses on complex commercial and intellectual property litigation, including disputes related to structured finance, pharmaceuticals, medical devices and biotechnology products, and consumer products. She has handled a wide variety of litigation and dispute resolution at all stages, including pre-litigation counseling, discovery, dispositive motion practice, arbitration, trial, and appeals. Prior to joining Patterson Belknap, Ms. Won served as a Law Clerk to the Honorable Ann Claire Williams of the United States Court of Appeals for the Seventh Circuit.

Representative Matters

Complex Commercial Cases
Represent financial guaranty insurers in breach of contract and fraud actions related to residential mortgage-backed securities.

Represented a major pharmaceutical company in private arbitration concerning a contract dispute related to the joint commercialization of an important biologic.

Represented insurance company in breach of contract action related to employee compensation agreement.

Intellectual Property Cases
Represented a leading medical device company in patent litigation concerning cardiovascular stents.

Represented a leading pharmaceutical and medical device company against claims of patent infringement.

Represented an altitude simulation technology company in patent litigation concerning hypoxic athletic equipment.

Represented major manufacturers of consumer products in anti-counterfeiting actions nationwide, including the successful seizure of counterfeit products from dozens of individuals and businesses that have manufactured and distributed counterfeits.

Defended consumer-products manufacturer against false advertising claims in putative class actions.

Conducted internal investigation into claims related to violations of antitrust laws.

Pro Bono Matters
As co-lead trial counsel in federal court, represented prisoner in claims against correctional officers for violations of First Amendment rights.

As co-lead trial counsel in federal court, defended police detective against claims of civil right violations.

Successfully challenged client’s inclusion in New York State’s Central Register for child abuse and neglect.


  • U.S. Court of Appeals, Seventh Circuit
  • U.S. District Court, Southern and Eastern Districts of New York
  • New York
  • Massachusetts