Legal analysis: it depends on the specific situation, the key is what to buy counterfeit products for. 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. Patent infringement should meet the following conditions: there is an infringed object: that is, the infringed patented product or method must be protected by the patent law, and the implementation of expired, invalid or abandoned patents does not constitute infringement.
Legal basis: Article 120 of the Civil Law of People's Republic of China (PRC) infringes, and the infringed has the right to request the infringer to bear the tort liability. Article 183 Where an infringer damages himself by defending the civil rights and interests of others, he shall bear civil liability and the beneficiary may give him appropriate compensation. If no infringer or infringer escapes or is unable to bear civil liability, and the victim requests compensation, the beneficiary shall give appropriate compensation.