What materials should be provided to declare a patent invalid?

The client explains the cause of action, the reasons for invalidation and the factual basis, and determines the purpose of the request for invalidation. Sign an agency contract for invalidation and a patent agency power of attorney. The identity certificate submitted by the client, including a copy of the business license of the enterprise and the identity certificate of the legal representative; If the customer is an individual, provide a copy of ID card. The related expenses paid by the client in advance include agency fees, invalidation request fees, evidence collection and investigation fees, retrieval fees, travel expenses and other related expenses actually incurred. The client provides the relevant retrieval materials of the prior rights related to the invalid patent in written form, or provides the relevant technical materials in the same technical field, similar technical field or related technical field. The information provided by the customer should be original. If only photocopies are provided, written proof shall be provided at the same time, including the source of photocopies, the time of printing and publication, and the front cover, 23 or back cover and title page of the materials. If the patent for appearance is invalid, it is necessary to provide photos, picture books and other materials that are the same as or similar to the patent, and as far as possible provide notarized proof materials such as invoices, contracts and objects previously manufactured and sold.