What is the exemption of patent infringement?

Legal analysis: anyone who uses or sells a patented product that he doesn't know was manufactured or sold without the permission of the patentee or a product directly obtained by the patented method for the purpose of production and operation, and can prove the legal source of the product, shall not be liable for compensation. That is, the act of using or selling infringing products in good faith still constitutes patent infringement, but those who can prove the legal source of their products can be exempted from liability for compensation.

Legal basis: Article 70 of the Patent Law of People's Republic of China (PRC). The patent administrative department of the State Council may, at the request of the patentee or interested party, handle patent infringement disputes that have great influence in the whole country.

The administrative department for patent affairs of the local people's government shall, at the request of the patentee or interested party, handle patent infringement disputes, and may merge cases of infringement of the same patent right within its administrative area; Cases of cross-regional infringement of the same patent right may be requested to be handled by the patent administration department of the local people's government at a higher level.