Robots have been applied in a broad range of areas, including assembly lines and factories, warehouse logistics, military defense, and medical care, to name a few. Their great business potential has lured investors and technology companies. This book provides an overview of robot technologies, including service robots, industrial robots, and medical robots, as well as the related AI (Artificial Intelligence) and sensor technologies. Using patent mining techniques, comprising of text and data mining, this book reveals major vendors' patent deployment and technology trends. Also included are the business outlook and opportunities for perspective entrants.