Is it infringement to buy and sell patented products?

It depends on the specific situation. Article 70 of the Patent Law stipulates that anyone who uses, promises to sell or sells an infringing patented product for the purpose of production and operation without knowing that it was manufactured and sold without the permission of the patentee shall not be liable for compensation. Therefore, whether ... the product infringing the patent right is infringing depends on whether the buyer knows that the product is infringing.

legal ground

Article 70 of the patent law

Anyone who uses, promises to sell or sells an infringing patented product for the purpose of production and operation without knowing that it was manufactured and sold without the permission of the patentee shall not be liable for compensation if he can prove the legal source of the product. Therefore, whether ... the product infringing the patent right is infringing depends on whether the buyer knows that the product is infringing.