1 Without permission, mark the patent number of others on the products manufactured or sold by it or on the packaging of the products;
2. Using other people's patent numbers in advertisements or other promotional materials without permission, causing people to mistake the technology involved for other people's patented technology;
3. Use the patent number of others in the contract without permission, which makes people 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 63 of the Patent Law of People's Republic of China (PRC) shall bear civil liability in accordance with the law, and the administrative department for patent affairs shall order it to make corrections and make a public announcement, confiscate the illegal income, and may impose a fine of less than four times the illegal income.