David Yun

David Yun is an associate in Cooley LLP's Washington, D.C. office, where his practice focuses on patent litigation in federal courts and before the U.S. International Trade Commission (ITC), as well as matters involving post-Leahy-Smith America Invents Act (AIA) issues. His technical experience spans a range of areas, including chemical mechanical polishing (CMP) slurries, geolocation, cash-out functionality, adaptive bitrate streaming, toner cartridges, artificial eyelashes, applied optoelectronics, and Wi-Fi modems. His background in electrical engineering, including research on semiconductors and experience designing and testing Wi-Fi modems, provides a foundation for handling complex technology disputes.

Yun's litigation experience includes representing both plaintiffs and defendants. He has been involved in the multi-faceted dispute between Beckman Coulter, Inc. and Cytek Biosciences, Inc., appearing as lead counsel and counsel for Cytek Biosciences in patent infringement actions. These cases concern sophisticated technology such as Aurora flow cytometers and wavelength division multiplexing (WDM) optical patents, involving claims of willful infringement and various motions for summary judgment regarding validity and non-infringement.

Yun is also a registered practitioner with the U.S. Patent and Trademark Office, indicating his experience with administrative patent proceedings. The Cytek Biosciences, Inc. v. Beckman Coulter, Inc. dispute notably includes Post-Grant Review (PGR) proceedings, demonstrating his engagement with PTAB matters in conjunction with district court litigation.

David Yun earned his J.D. from Georgetown University Law Center in 2022 and holds a B.S. in Electrical Engineering from the University of Maryland, College Park, obtained in 2017. He is admitted to practice in the District of Columbia.