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David J. Tsai

David J. Tsai Partner, Intellectual Property


David is Co-Managing Partner of the Vinson & Elkins LLP's Taipei office and also resident in the San Francisco office. David's 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 inter partes review petitions. 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. He has written and lectured on Hatch-Waxman/ Abbreviated New Drug Application (ANDA) litigation, standard essential patents, FRAND/ RAND royalties, Internet software applications, stem cell gene therapy, and U.S. patent law.

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 committed to serving pro bono clients and nonprofits. He has represented pro bono clients at settlement conferences in the Northern District Court. In addition, he has worked on civil rights and immigration pro bono matters with the Asian Law Caucus and the Lawyers' Committee for Civil Rights, including successfully representing an HIV+ transgender Mexican woman in immigration court. David also serves as a board member for a number of nonprofit organizations and institutions, including the University of California, Riverside.

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 2016, he was selected to be one of the 18 Lawyer Representatives to the Ninth Circuit Judicial Council (United States District Court, Northern District of California).

David is fluent in spoken Taiwanese and Mandarin and represents over 30 leading Taiwan, China and Korea based companies.

蔡進昌律師為本所台北辦公室聯席管理合夥人,常駐舊金山辦公室。蔡律師擅長處理專利、營業秘密、複雜的違約,及產品瑕疵訴訟案件,客戶包括生物科技(藥物與基因工程)、醫療設備、軟體(網際網路與行動裝置應用程式)與硬體(半導體、機上盒、智慧型手機、太陽能晶圓與發光二極體/LED/OLED)等科技公司。蔡律師法律事務經驗豐富,包括在國際仲裁案件中為客戶提供辯護、著作權與商標訴訟處理、美國電子工程專利申請、就專利權提供專利有效性、可實施性與無侵權等專業意見,以及處理生物科技專利之權利歸屬程序。蔡律師也經常代表客戶進行專利磋商、授權及為智慧財產權提供整體策略。

蔡律師曾被多家商業和技術出版物,包括紐約時報(The New York Times),報導。蔡律師在Hatch-Waxman法案/簡略新藥申請(ANDA)訴訟、標準必要專利、FRAND/ RAND(專利授權公平合理非歧視/合理非歧視原則)專利授權金、網路軟體應用、幹細胞基因療法和美國專利法方面著有專文及相關講座。

在從事法律職務前,蔡律師曾在多家網路新創公司負責產品管理工作,側重開發在線合作通信平台。蔡律師並曾在史丹福大學帶領即時PCR DNA檢測產品線的產品管理團隊,聯合開發第一個線上問題設置項目。

蔡律師在公益法律服務和協助非營利單位客戶上亦竭盡心力。他曾義務協助客戶在聯邦北區法院進行和解會議。另外,蔡律師也熱心參與在亞洲法律聯盟(Asian Law Caucus)和律師民權委員會(Lawyers’ Committee for Civil Rights)等法律服務單位與民權或移民相關的公益事務,包括成功地為一位HIV陽性墨西哥變性婦女在移民法庭辯護。蔡律師在多個非盈利組織和機構擔任董事,例如加州大學河濱分校。

蔡律師被Recorder譽為“50 California Lawyer on the Fast Track”,“Super Lawyer in Intellectual Property Litigation”,並曾被全國亞太美國律師協會譽為“Best Lawyer Under 40”。

蔡律師能說流利的國、臺語,代理超過30家領先業界的台灣、中國和韓國的公司。

Experience Highlights

  • (D. Del.) — Co-led countersuit brought by a major Taiwanese handset telephone manufacturer against major U.S. computer manufacturer in patent litigation relating to operating systems and mobile handsets 
  • (E.D. Tex.) — Defended a major Taiwanese LED producer in a patent infringement action involving LED manufacturing technology 
  • (N.D. Cal.) — Defended the world’s largest sporting goods company in a patent infringement action involving patents related to altimeter technology 
  • (Cal. Super. – Santa Clara Cnty.) — Defended a Taiwanese motherboard company and its U.S. subsidiary against a major electronics retailer in litigation involving various claims including fraud and breach of contract
  • (AAA Arbitration) — Defended an employee in California accused of trade secret misappropriation involving semiconductor silicon materials in a two-week arbitration
  • (AAA/ICDR Arbitration) — Defended a Taiwanese motherboard manufacturer in a five-day international arbitration brought by a German computer manufacturer involving product defect claims

Patent Litigation

  • (N.Y. Sup.) — Counsel for one of the world’s largest connectors manufacturers in litigation involving various claims including breach of contract involving USB 3.0 
  • (C.D. Cal.) — Counsel for a major television supplier in patent litigations involving MPEG-2 and ATSC technology 
  • (E.D. Tex.) — Counsel for the world’s largest computer and optical disk drive (ODD) manufacturers in patent litigation involving ODD technology
  • (C.D. Cal.) — Counsel for the world’s largest disk drive manufacturer in a patent infringement action involving Blu-ray technology 
  • (N.D. Cal.) — Counsel for the largest U.S. software manufacturer in a case alleging infringement of seven patents related to set-top box technology
  • (N.D. Cal.) — Counsel for the largest Korean semiconductor company in a patent infringement and unfair competition case related to computer memory Dynamic Random Access Memory (DRAM) technology
  • (E.D. Tex.) — Counsel for Internet software companies in a patent infringement action relating to cloud computing data storage technology
  • (E.D. Tex.); (S.D. Ind.) — Counsel for a major U.S. online retailer in declaratory judgment and patent infringement actions involving technology related to electronic catalogue systems
  • (E.D. Tex.) — Counsel for a major Japanese printing equipment manufacturer in a patent infringement action involving a patent related to printer/copier technology

Life Sciences

  • (S.D.N.Y); (D. Nev.) — Counsel for one of the largest U.S. generic pharmaceutical companies in Hatch-Waxman ANDA litigation regarding competing branded oral contraceptive, YAZ®
  • (S.D.N.Y.) — Counsel for one of the largest U.S. generic pharmaceutical companies in Hatch-Waxman ANDA litigation regarding competing branded oral contraceptive, Yasmin®; defendants' motion for judgment on the pleadings granted, and plaintiffs' patent infringement claims dismissed with prejudice
  • (D. Nev.) — Counsel for one of the largest U.S. generic pharmaceutical companies in Hatch-Waxman ANDA litigation regarding competing branded oral contraceptive, SEASONIQUE®
  • (D. N.J.); (E.D. Mich.) — Counsel for a brand name pharmaceutical company in a Hatch-Waxman ANDA patent infringement action arising out of a submission of an ANDA referencing branded product CARDENE® I.V., an intravenous calcium channel blocker for treatment of hypertension
  • (N.D. Cal.) — Counsel for a large U.S. biotechnology company in litigation involving patents directed to human cytomegalovirus (CMV) regulatory sequences

Copyright Litigation

  • (N.D. Cal.) — Counsel for a major U.S. lighting retailer in a copyright infringement action 

Trade Secrets Litigation

  • (C.D. Cal.) — Counsel for one of the world’s largest manufacturers of cable modem routers and its employees in litigation involving various claims including misappropriation of trade secrets related to cable modem technology, breach of contract, and unfair competition

經歷

  • (美國德拉瓦聯邦地區法院)— 為一台灣大型行動電話製造商在與美國某大型電腦製造商就關於作業系統與行動電話之專利訴訟中提起反訴
  • (美國德州東區聯邦地區法院)— 為台灣某大型 LED 製造商於涉及 LED 製造技術的專利侵權訴訟中擔任辯護律師
  • (美國加州北區聯邦地區法院)— 代理全球最大運動用品公司在一關於高度計技術專利的專利侵權訴訟為辯護
  • (加州聖塔克拉拉郡高等法院)— 為一台灣主機板公司及其美國子公司與某大型電子產品零售商關於詐欺與違約等請求的訴訟案中擔任辯護
  • (美國仲裁協會仲裁)— 為加州某位被控侵佔半導體矽料營業秘密的員工,於為期兩週的仲裁案中擔任助辯律師
  • (美國仲裁協會/國際爭議解決中心仲裁)— 在一由某德國電腦製造商所提為期五天之產品瑕疵國際仲裁案中為一台灣主機板製造商擔任助辯律師

專利訴訟

  • (紐約最高法院)— 擔任全球最大連接器製造商之一的辯護律師,進行包括涉及 USB 3.0 違約等請求的訴訟
  • (美國加州中區聯邦地區法院)— 為某大型電視供應商就涉及 MPEG-2 與 ATSC 技術的專利訴訟擔任辯護律師
  • (美國德州東區聯邦地區法院)— 在一涉及光碟機(ODD) 技術的專利訴訟中擔任全球最大電腦與ODD製造商的辯護律師
  • (美國加州中區聯邦地區法院)— 於一藍光技術的專利侵權訴訟中擔任全球最大磁碟機製造商的辯護律師
  • (美國加州北區聯邦地區法院)— 於一涉及機上盒技術七項專利指控侵權的訴訟案中擔任全美最大軟體製造商的辯護律師
  • (美國加州北區聯邦地區法院)— 為韓國最大半導體公司在關於電腦記憶體動態隨機存取記憶體(DRAM)技術之專利侵權與不公平競爭訴訟中擔任辯護律師
  • (美國德州東區聯邦地區法院)— 於一涉及雲端運算資料儲存技術之專利侵權訴訟中擔任某網際網路軟體公司辯護律師
  • (美國德州東區聯邦地區法院);(美國印第安納南區聯邦地區法院)— 於一電子型錄系統技術的專利侵權訴訟中擔任美國某大型線上零售商的辯護律師
  • (美國德州東區聯邦地區法院)—於一涉及印表機/影印機技術的專利侵權訴訟擔任日本某大型列印設備製造商的辯護律師

生命科學

  • (美國紐約南區聯邦地區法院);(美國內華達聯邦地區法院)— 代理美國某一大學名藥公司與競爭品牌 YAZ® 之口服避孕藥進行Hatch-Waxman ANDA 法案的訴訟
  • (美國紐約南區聯邦地區法院)— 擔任美國某大學名藥公司的辯護律師,與競爭品牌 Yasmin® 之口服避孕藥進行關於Hatch-Waxman ANDA 法案訴訟的訴訟;案中被告逕為判決的聲請獲准,而原告的專利侵權請求則遭駁回不得上訴
  • (美國內華達聯邦地區法院)— 擔任美國某一大型學名藥公司的辯護律師,與競爭品牌 SEASONIQUE® 之口服避孕藥進行關於 Hatch-Waxman ANDA 法案訴訟
  • (美國紐澤西聯邦地區法院);(美國密西根東區聯邦地區法院)— 擔任某品牌製藥公司的辯護律師,進行因提交 ANDA 參考品牌產品 CARDENE® I.V.(其為用於治療高血壓的靜脈注射鈣離子通道阻斷劑)所興之 Hatch-Waxman ANDA 專利侵權訴訟
  • (美國加州北區聯邦地區法院)— 擔任美國某大型生物科技公司的辯護律師,進行關於人類巨細胞病毒(CMV)調控序列專利的訴訟

著作權訴訟

  • (美國加州北區聯邦地區法院)— 在一著作權訴訟中為美國某大型照明零售商辯護

營業秘密訴訟

  • (美國加州中區聯邦地區法院)— 為全球最大之纜線數據機路由器製造商及其員工在涉及侵佔營業秘密、違約以及不公平競爭等行為的訴訟案中擔任辯護律師

Contact Details

T +1.415.979.6988
F +1.415.276.2372
dtsai@velaw.com
555 Mission Street
Suite 2000
San Francisco, CA 94105
Local time: 8:54 AM
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T +1.415.979.6988
F +1.415.276.2372
dtsai@velaw.com
1841 Page Mill Road
Suite 200-B
Palo Alto, California  94304
Local time: 8:54 AM
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T +886.2.2176.5368
dtsai@velaw.com
Taipei 101 Tower, Suite A, 52F
No. 7, Sec. 5, XinYi Road
Taipei City 11049, Taiwan R.O.C.
(By Appointment Only)
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David's Practices

  • Santa Clara University School of Law, J.D., 2006
  • Stanford University, M.S., Biological Sciences, 1998
  • Harvard University, A.B., Biochemical Sciences, 1997
  • Admitted to practice: California; U.S. District Court of Appeals for the Federal Circuit; U.S. Court of Appeals for the Ninth Circuit; U.S. District Court for the Central District of California; U.S. District Court for the Eastern District of California; U.S. District Court for the Eastern District of Texas; U.S. District Court for the Northern District of California; U.S. District Court for the Southern District of California
  • Registered Foreign Attorney in Taiwan (Member of Taipei Bar Association)
  • Other languages: Taiwanese, fluent; Chinese Mandarin, fluent 
  • Judicial extern to the Honorable Howard R. Lloyd, U.S. District Court for the Northern District of California, 2005
  • AIDS Legal Referral Panel (ALRP) James C. Hormel Philanthropist Award, 2017
  • Selected to the Northern California Super Lawyers list, Super Lawyers,  2013−2017
  • California API Legislative Caucus Heritage Award (Excellence in Civil Rights), 2016
  • Minority Corporate Counsel Association, Rising Star, 2015
  • The Recorder, "Lawyer on the Fast Track," 2013
  • National Asian Pacific American Bar Association Best Lawyer Under 40 Award, 2013
  • Daily Journal, one of the top “Five Associates To Watch” in California, 2013
  • Inaugural Santa Clara University School of Law Young Alumni "Rising Star Award,” 2013
  • Bar Association of San Francisco Barristers Club "Diversity Award,” 2012
  • Selected to the Northern California Rising Stars list, Super Lawyers, 2009−2012
  • Santa Clara County Bar Association “Barrister of the Year," 2010
  • Minority Bar Coalition "Rising Star Award," 2009
  • American Bar Association Section of Litigation "Outstanding Subcommittee Chair Award," 2008
  • Asian Americans Advancing Justice | Asian Law Caucus, Board of Directors, 2016-present
  • Asian Law Alliance, Advisory Board, 2016−present
  • AIDS Legal Referral Panel (ALRP), Board of Directors, 2007−2014
  • Asian American Bar Association, Vice President/President-Elect, 2017−2018; Secretary, 2015−2016; Board of Directors, 2012−2015
  • Bar Association of San Francisco (BASF), Board of Directors, 2010−2011, 2016-present
  • BASF Barristers Club, Board of Directors, 2009−2011; Diversity Director, 2009−2010
  • BASF Justice & Diversity Center (JDC), Board of Directors, 2013−2015
  • Bay Area Lawyers for Individual Freedom (BALIF), Board of Directors, Co-Chair, 2010−2012; Treasurer, 2008−2010
  • BALIF Foundation, Board of Directors, Chair, 2015−2016
  • EQCA, Board of Directors, 2014−present
  • Lambda Legal, Board of Directors, 2015−present
  • Lawyer Representative to the Ninth Circuit Judicial Council, 2016−present
  • Minority Bar Coalition, Co-Chair, 2009−2010
  • Phillips Exeter Academy, Alumnus Admission Representative, 1997−present
  • Santa Clara County Bar Association, Board of Trustees, 2007−2009
  • Santa Clara University School of Law, Law Alumni Board of Directors, 2009−2015
  • Santa Clara University School of Law, Law Advisory Board of Directors, 2017−present
  • Silicon Valley Intellectual Property Law Association (SVIPLA), Board of Directors, 2008−2016, Past President
  • State Bar of California's Legal Services Trust Fund Commission, Commissioner, 2014−2017
  • Taiwanese American Lawyers Association (TALA), Board of Directors, 2017−present
  • William A. Ingram Chapter (American Inns of Court), Executive Committee, 2012−present, Treasurer, 2015−2016
  • UCR Foundation, Board of Trustees, 2015−present