Patent infringement, what if the other party infringes the patent right? How to warn patent infringement?

Before filing a patent lawsuit, the patentee issues an infringement warning to the infringer, which is not stipulated in China's patent law, but it is often used in real life and often plays a good role.

To do a good job of investigation and research before warning, we must be absolutely sure of the identification of infringement before using it.

The writing of infringement warning letter can be tough or gentle according to different situations. Generally, the following contents should be explained:

(1) The patent number of the patentee and the main rights of the patent;

(2) Where the product or method of the other party infringes the patent right and wishes to stop or prohibit the manufacture, sale and use of the other party;

(3) When do you expect the other party to give an answer?

(4) If the other party does not reply, what measures can the patentee take?