Official NY OCA attorney registration data · Updated 2026 Methodology Discipline records

William Ninghan Yau

Currently registered

William Ninghan Yau is an attorney admitted to the New York State Bar in 2020, with a registered practice address in New York, New York. According to the New York Office of Court Administration, the current registration status on record is Currently registered.

Registration number5777222
Bar statusCurrently registered
Year admitted2020
Judicial departmentDepartment 1
Law schoolUniversity of Michigan Law School
Practice cityNew York, NY
CountyNew York
Firm / organizationDesmarais Llp
Office address230 Park Ave Fl 26, New York, NY, 10169
Phone(212) 808-2975
Next registration dueOct 2026

About Desmarais LLP

Desmarais LLP is an intellectual property law firm whose work centers on litigating disputes that involve complex technology. Its matters include patent infringement cases and other intellectual property disputes, and it represents both plaintiffs and defendants. The firm also handles appeals, including patent appeals at the U.S. Court of Appeals for the Federal Circuit, and appears before the U.S. International Trade Commission and the Patent Trial and Appeal Board. Its disputes span fields such as semiconductors, telecommunications, software, pharmaceuticals, medical devices and biotechnology.

Practice areas of Desmarais LLP:

Intellectual Property Appeals Arbitration & Mediation Commercial Litigation

These are the practice areas the organization describes on its website. They are not a statement about William Ninghan Yau’s own practice or any specialty certification.

View the Desmarais LLP profile and its 46 registered attorneys →

Office location

Registered office address on file with the New York State Bar. Verify before visiting, as the address reflects the contact on record and may be a firm rather than a personal office.

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Bar status can change at any time. For the authoritative, real-time status of William Ninghan Yau, confirm directly through the official New York Attorney Search using the registration number above. This record is republished from public New York State data and is provided for reference only — it is not legal advice and not an endorsement.

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