David Wang is an award-winning Intellectual Property partner in Mayer Brown's Palo Alto office. Focusing on patent infringement litigation and adversarial patent licensing negotiations, David won “Patent Licensing Lawyer of the Year in California” (2017), is the exclusive winner in California of the 2017 Client Choices Award which is based on his clients' extraordinary satisfaction for his work as a patent lawyer, has been repeatedly listed among the World’s Leading Patent Litigators by IAM Patent 1000, named an “IP Star” by Managing Intellectual Property (2014, 2015, 2016, 2017, 2018) and recognized as a Super Lawyer in intellectual property litigation by Super Lawyers in 2010. David handles high-stakes patent infringement matters before various courts, the Federal Circuit, and the International Trade Commission (ITC) in Section 337 actions. One jury trial victory in a complex patent and trade secret action was awarded the “Defense Verdict of the Year” by the San Francisco Daily Journal and a “Top Ten Defense Verdict for 2003” by The National Law Journal. David is described as a “top-notch lawyer” and a “brilliant all-round IP litigator who also knows the ins and outs of licensing” and who “understands the psychology and personality of his counterpart” (IAM Patent 1000).

David has represented numerous leading companies in patent litigations or patent licensing negotiations including Rohm Co., Nanya Technology, Mitsubishi Electric, Fujitsu, Toshiba, Intel, Acer, Cadence Design Systems, Tyco International, AmTran, Vizio, Universal Instruments, and others. David has experience representing clients in a wide range of technologies including electronics, digital and analog circuits, software, semiconductor devices, semiconductor processes, memory chips, circuit emulation, power circuits, computers, servers, disk drives, robotics, high definition TV, plasma and LCD displays, DVD players, optics, optical communication products, routers, lasers, wireless communication devices and protocols, mobile phones, base stations, microprocessors, network switches, 802.11 devices, silicon on substrate devices, bar code scanners, medical devices, catheters, surgical tools, ultrasound imaging machines, MRI machines, pacemakers, defibrillators, MEMS devices, RFID, organic semiconductors, and chemicals.

David earned his BS in electrical engineering and his MS in electrical engineering at the University of Southern California. He earned his JD at the University of Southern California School of Law.


  • Represented Rohm Co., Ltd. in various adversarial patent licensing negotiations against several prominent companies.
  • Acted as trial counsel for Fujitsu Limited and its subsidiaries in various patent infringement litigations involving hard disk drives, computers, servers, workstations and optical communication products. He has represented Fujitsu in adversarial patent licensing negotiations against various large technology companies.
  • Represented Mitsubishi Electric Corp. for more than a decade in numerous patent litigations and adversarial patent cross-licensing negotiations. Examples include a Section 337 action before the ITC involving patents on semiconductor memory chips and licensing negotiations involving large technology companies. He also worked on numerous other matters involving TVs, printers, digital video recorders, touch screen displays, navigation systems, DVD players, power products, EEPROMs, DRAMs, DDR SDRAMs, and SGRAMs.
  • Represented Toshiba in adversarial patent cross-licensing negotiations against a large technology company.
  • Represented Cadence Design Systems in a complete defense victory for Cadence and its subsidiary Quickturn Design Systems in a complex US $1 billion case brought by Mentor Graphics involving allegations of trade secret misappropriation, common law misappropriation, breach of confidence, unfair competition and patent infringement of field programmable gate array technologies. After a four-week trial, the jury found for Cadence on every one of the 35 issues, resulting in a finding of no damages. This matter was recognized as “Defense Verdict of the Year” by the San Francisco Daily Journal and as a “Top Ten Defense Verdict for 2003” by The National Law Journal.
  • Acted as trial counsel for Acer, the world’s then-third largest computer manufacturer, in patent infringement actions over personal computers brought by a larger competitor in Texas and the ITC Section 337 action. A completely favorable decision by the ITC staff attorney led to a favorable settlement.
  • Acted as lead trial counsel for AmTran and Vizio in patent infringement action brought by a competitor in Texas, and achieved a favorable settlement in this high-definition TV case involving plasma and LCD monitors.
  • Acted as trial counsel for Universal Instruments Corp. against “patent troll” plaintiffs. After successfully settling with another company over the same patent on a robotic machine for assembling printed circuit boards, plaintiffs sued Universal with plans to pursue the rest of the industry. However, after a jury trial in a plaintiff-friendly Texas jurisdiction, the litigation work led to a complete victory for Universal, including findings that every asserted patent claim was invalid and Universal's key robotic machine did not infringe the patent.
  • Acted as trial counsel for General Surgical Innovations (Tyco Healthcare). in three medical device patent infringement actions, two as plaintiff and one as defendant, against Origin Medsystems, Inc. (Guidant Corp.) The jury returned a verdict for GSI on virtually all issues, and the case settled favorably after a Federal Circuit appeal.
  • Represented China Southern Glass Holding Co., a large Chinese conglomerate, as a defendant in a patent infringement action involving the processing of vias in semiconductor devices.
  • Represented PSC and Spectra-Physics, two large manufacturers of laser-based barcode scanners in several patent infringement actions involving barcode scanner technology.
  • Represented Intermedics, a manufacturer of cardiac pacemakers and defibrillators, in several patent infringement actions.


University of Southern California Gould School of Law, JD

University of Southern California, MS

University of Southern California, BS


  • California


  • US Patent and Trademark Office