Because patents usually mean that enterprises have exclusive rights to the production technology of the product, but they are not the guarantee of product quality. Whether there is a problem with the quality of the product has nothing to do with whether there is a patent.
Product quality appraisal can go to the appraisal institution designated by the administrative department of quality and technical supervision at or above the provincial level, and organize experts to investigate, analyze and judge the disputed products according to the entrustment requirements of the applicant, and issue a quality appraisal report.