Legal analysis: 1. Manufacturing patented products without permission, intentionally using patented products of inventions or utility models, selling and promising to sell patented products without permission, using patented methods and using, selling and promising to sell products directly obtained by patented methods. 5. Importing patented products or products directly obtained by patented methods, passing off others' patents and passing off patents.
Legal basis: Article 70 of the Patent Law of People's Republic of China (PRC) uses, promises to sell or sells an unknown patent infringing product that is manufactured and sold without the permission of the patentee, and can prove the legal source of the product, and 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.