The purpose of patent retrieval is to let enterprises know the trend of world patents, avoid repeated development and waste of funds, and make great contributions to enterprises. Because there are many patents in the world and they have priority, no one can guarantee that their ideas are unique in the world. The invention patent you can think of is probably thought of by others, so any individual or enterprise should carefully search before applying for a patent-whether its own idea has been realized by others and whether the patent has appeared in the databases of major patent offices around the world without knowing it.