(1) Changes of patent applicants and patentees.
Change agreement and power of attorney
(2) Changes of inventors and designers
Change the agreement, power of attorney and the signature of the applicant/patentee.
Add: All signatures after adding.
Content of change: signature of inventor and designer before change, and signature of inventor and designer after change.
From the date when the patent application is granted, if any entity or the grant of the patent right does not conform to the relevant provisions of the Patent Law, it may request that the patent right be declared invalid. Where a patent right is requested to be declared invalid or partially invalid, the applicant shall pay the required fees and submit a request for invalidation in duplicate, indicating the name and patent number of the patent requested to be declared invalid, the facts and reasons on which it is based, and attach the necessary evidence. If a party refuses to accept the decision on the request for invalidation of a patent, he may bring a suit in a people's court within three months from the date of receiving the notice. The patent office shall register and announce the decision after it becomes legally effective. An invalid patent right shall be regarded as nonexistent from the beginning.