Xirui Zhang, Ph.D.

Xirui has worked on over 20 inter partes review (IPR) proceedings, representing both petitioners and patent owners. She has experience searching prior art, developing validity strategy, crafting effective briefing, preparing expert and lay witnesses, and arguing in oral hearing.

Xirui's practice extends to evaluations for diligence, clearance, landscape, freedom-to-operate, and design-around assessments. She provides legal opinions on infringement, validity, and patentability. Xirui also advises clients through all stages of preparation and prosecution of U.S. utility and design patent applications, including handling invention disclosures; preparing new and continuing patent applications; responding to office actions; preparing and filing appeals to the PTAB; and managing domestic and international portfolios aligned with client business goals.

Xirui's experience spans numerous technologies, including medical and analytical devices, optical microscopy and spectroscopy, optical biosensing, optoelectronics, optical coherence tomography, endoscopy, magnetic resonance imaging, ultrasound imaging, image and video processing, nanotechnology, in vitro molecular diagnostics, consumer electronics, mobile devices, digital camera, electronic authentication, LED lighting systems, robotics, neurostimulation and neuromodulation, 3D printing and additive manufacturing, virtual and augmented reality, computer processor, power tools, and artificial intelligence (AI) technologies in medicine.

Before joining Finnegan, Xirui completed her doctoral research in the Optical Characterization and Nanophotonics (OCN) laboratory at the Photonics Center of Boston University, where she built high-throughput optical biosensing instruments for molecular research and point-of-care diagnosis.Her collaboration with scientists and engineers during her studies strengthens her ability to work with inventors and experts on technical intricacies in her patent practice.