Face recognition combines knowledge and techniques in biology, psychology, pattern recognition, image processing, image analysis, machine vision, AI (Artificial Intelligence), and can be widely used in a broad range of application scenarios such as home security, access control, driving monitoring, face payment, ATM, e-commerce, human-computer interaction, medical diagnosis, and identity verification. In recent years, it has attracted several international brands such as Microsoft, Amazon, IBM, Google, Intel, Apple, Facebook, Sony, and Samsung to invest in face recognition technology solutions and develop relevant applications. This report outlines key areas of face recognition patents granted by the USPTO (United States Patent and Trademark Office) and examines patent deployment strategies of 20 major IT brands which focus on face recognition technology.