Patent retrieval is a process of selecting documents or information that meet specific requirements from a large number of patent documents or patent databases according to one or several characteristics.
Patented technology, as its name implies, refers to the technology protected by patents within the validity period. According to the classification of patents in China's patent law, it mainly includes technologies protected by invention patents and utility model patents. Because the design patent protects the new design, not the technology, it should be called the design patent, not the patented technology. But generally speaking, patent technology in a broad sense includes invention patent, utility model patent and design patent.