1. If the inventor or designer is changed, a written explanation of the added inventor or designer shall be provided, indicating that the added three people are also inventors or designers of the invention or utility model, and all inventors and designers indicated in the original application shall sign for confirmation.
2. To change the patent applicant or patentee, it is necessary to provide the original contract or a copy of the contract and a notarial certificate to prove that the right has been transferred.