Yung-Hoon Ha, PhD


Sam Ha

Yung-Hoon (Sam) Ha's practice focuses on patent litigation, post-grant proceedings before the PTAB, procuring patents before the USPTO, and advising clients on patent matters.

He focuses his practice on materials related technology, such as microprocessor fabrication, carbon nanotubes, fullerenes, quantum dots, glasses, polymers, batteries, solar cells, solar concentrators, plasma sputtering, wafer manufacturing and razor blades. He has worked on numerous other technologies that include microprocessors, wireless communication devices, digital cameras, automated staining machines and tracer compounds.

Dr. Ha has significant experience with patent litigation in the Federal Courts and the International Trade Commission. He also has significant experience before the PTAB in inter partes review proceedings. For more than a decade, he has successfully obtained several key patents for his clients. Some representative clients include Eastman Kodak Company and QD Vision.

Some representative representations include:

  • successfully invalidated all 371 claims of 10 patents asserted against multiple defendants (in which we represented two of the defendants) in one of the largest IPR proceedings ever brought, thereafter affirmed by the Federal Circuit on all issues;
  • representing a technology company in a patent infringement case in the Northern District of California over quantum dots;
  • representing a multinational technology company in a patent infringement case in the Eastern District of Texas and before the PTAB over semiconductor manufacturing devices and processes;
  • successfully represented/representing a multinational technology company before the PTAB over plasma deposition technology;
  • successfully represented three multinational technology companies in a Section 337 proceeding before the ITC filed by a complainant related to interconnect structures; and
  • successfully defended a multinational company in a Section 337 proceeding before the ITC filed by another multinational corporation related to digital camera technology.

Dr. Ha also devotes a portion of his professional time to pro bono matters, including advising and representing artists on various intellectual property matters.

Prior to entering the practice of law, Dr. Ha was a research assistant under Professor Ned Thomas at MIT. Dr. Ha has published approximately 10 scientific articles and served as a reviewer for journals and conference proceedings.

Dr. Ha is also a named as an inventor on the following patents:

  • Ha, Y.-H., and E.L. Thomas. Cyclic shrinkage of a templated 3D network material. US Patent No. 7,329,377.
  • Ha, Y.-H., N. Nikolov, S.K. Pollack, B.D. Martin, and R. Shashidhar. Optimization methods for synthesis of highly conducting transparent thin polymer films. US Patent No. 7,320,813.

Publications & News


December 22, 2017

Trends in Automotive Technology: 2017 and the Road Ahead

An article by David Cavanaugh, Yung-Hoon (Sam) Ha, Natalie Hanlon Leh, Mike Silhasek and Todd Zubler, contributed to Law360, looks back at 2017 to describe how the legal landscape for automotive technology has been developing, particularly with respect to autonomous vehicles, and discusses where automotive technology and legal issues may be heading in 2018 and beyond.

August 7, 2017

The Use of Applicant Admitted Prior Art in IPR Petitions

In this article published by Bloomberg BNA's Patent, Trademark & Copyright Journal,  Don Steinberg, Yung-Hoon Ha and Liv Herriot explore how the Patent Trial and Appeals Board has considered Applicant Admitted Prior Art (AAPA) when a petitioner has relied upon it as part of one or more of its grounds in its IPR petition requesting the Board invalidate a patent. The authors provide recommendations for both petitioners and patent owners based on how the Board has decided on this issue.

January 3, 2017

WilmerHale Announces 2017 Partner Elevations and Recognizes New Special Counsel

We are pleased to announce the elevation of our new partners, as well as to recognize our new special counsel.

December 11, 2014

Inter Partes Review And A Soon-To-Expire Patent

An article by Don Steinberg, Yung-Hoon Ha and Natalie Pous, published by Law360 on December 11, 2014.

May 20, 2011

Thermo Fisher Announces $3.5 Billion Acquisition of Phadia

Thermo Fisher Scientific Inc. announced that it has signed a definitive agreement to acquire Phadia-a Sweden-based company that develops, manufactures and markets complete blood-test systems to support the clinical diagnosis and monitoring of allergy and autoimmune diseases-from European private equity firm Cinven.


Skip Navigation Links.


JD, Fordham University School of Law, 2009

PhD, Materials Science and Engineering, Massachusetts Institute of Technology, 2002

BSc, Materials Science and Engineering, cum laude and with honors, Cornell University, 1997

Bar Admissions

New York

United States Patent and Trademark Office



Skip Navigation Links.