What is the patent invalidation system?

Patent invalidation system is a system in which a court or patent institution declares a defective patent invalid upon request. The institutions that accept patent invalidation vary from country to country. The Federal Republic of Germany is the federal patent court, Japan is the specialized department of the Patent Office, and China is the Patent Reexamination Board of the Patent Office. The reasons for requesting invalidation generally include: (1) The patent right should not be granted for substantive reasons. If the patent theme lacks novelty, creativity and practicality, the patent theme is not within the scope of granting the patent right. (2) The person who is granted the patent right has no right to obtain the patent right. For example, the theme of a patent is taken from other people's specifications and drawings. , or methods used by others without my consent.