(2) Search for related patents. According to the technical field and category of products, the patent data is retrieved by using the existing database system and according to the constructed retrieval formula, and the retrieval results are obtained.
(3) Analyze the legal status of the retrieved target patent. Through investigation and analysis, we can judge the validity, invalidity, termination and other rights of the target patent, and give relevant basis, so as to find out the patent that is still in the valid state for subsequent infringement analysis.
(4) Analyze the technical features in the product technical scheme by the method of patent writing or analysis, and list all the technical features contained in the technical scheme for further analysis.
(5) Analyze the patent infringement of this product. Find out the technical features in the effective patent claim, and judge whether the technical scheme of the product falls within the protection scope of the patent claim to be analyzed according to the principle of comprehensive coverage.