1, an object with a patent right has been infringed.
2. There is legal infringement.
3, for the purpose of production and operation.
4. Without the permission of the patentee.
legal ground
Rule 84 of the Implementing Rules of the Patent Law
The following acts are acts of counterfeiting other people's patents:
(a) without permission, mark the patent number of others on the products or product packages manufactured or sold by it;
(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.