David is a Partner in Pillsbury's San Francisco office and Co-Manages the firm's Taipei Office. His practice focuses on patent, trade secret, complex breach of contract, and product defect litigation for companies innovating biotechnology (pharmaceuticals and genetic engineering), medical devices, software (Internet and mobile apps), and hardware (semiconductors, set-top boxes, smartphones, solar wafers and light-emitting diodes/LED/OLED). His legal experience includes defending clients in international arbitration cases, litigating in the areas of copyrights and trademarks, preparing and prosecuting U.S. electrical engineering patent applications, drafting patentability, freedom-to-operate and non-infringement opinions, as well as patent interference in the area of biotechnology. He also represents clients in patent negotiations, licensing and overall intellectual property strategy.

David has been quoted in various business and technology publications including The New York Times.

Prior to his legal career, David worked in product management at Internet startups focusing on developing online collaborative communications platforms. David also previously led the product management team for a real-time PCR DNA detection product line and co-developed the first online problem sets at Stanford University.

David is the 2018 President of the Asian American Bar Association of the Greater Bay Area. He also serves as a board member for a number of nonprofit organizations and institutions, including the University of California, Riverside and the Bar Association of San Francisco.

David has been recognized as a top 50 California Lawyer on the Fast Track by The Recorder, Super Lawyer in Intellectual Property Litigation, and Best Lawyer Under 40 by the National Asian Pacific American Bar Association.

In addition to working with Fortune 500 companies, David works with many international companies based in Taiwan, China, Hong Kong, Korea, Japan, the UK, and Singapore.