Legal analysis: Patent invalidation refers to the system that any unit or individual can request the Patent Reexamination Board to declare the patent invalid if it thinks that the grant of the patent right is not in conformity with the provisions of the Patent Law from the date when China National Intellectual Property Administration announced the grant of the patent right. After the patent right has been granted and announced by the patent administrative department of the State Council, any unit or individual thinks that the patent right does not conform to the legal basis: Article 45 of the Patent Law of the People's Republic of China. Since the date when the patent administrative department of the State Council announced the grant of the patent right, any unit or individual thinks that the grant of the patent right does not conform to the relevant provisions of this Law, it may request the Patent Reexamination Board to declare the patent right invalid.