(a) without permission, mark the patent number of others on the products manufactured or sold by him or on the packaging of the products;
(two) without permission, using the patent number of others in advertisements or other promotional materials, making people mistake the technology involved for the patented technology of others;
(3) Using someone else's patent number in a contract without permission, causing people to mistake the technology involved in the contract for the patented technology of others;
(4) Forging or altering other people's patent certificates, patent documents or patent application documents.
Legal basis: Article 183 of the General Principles of the Civil Law of People's Republic of China (PRC) * * * If the infringer causes his own damage by protecting the civil rights and interests of others, the infringer shall bear civil liability and the beneficiary may give appropriate compensation. If no infringer or infringer escapes or is unable to bear civil liability, and the victim requests compensation, the beneficiary shall give appropriate compensation.