2. If the company is not clear, collect and analyze the characteristics of the product, and search with the combination of characteristics plus product +IPC;
3. If you can use American patent classification, search by function+keyword combination through American patent classification.
4. Most American products will indicate whether there is a patent or patent number, which can be searched directly.
5. Whether the inventor can be found by collecting the corresponding information, the United States can search the corresponding patent through the inventor.
6. Other non-patent retrieval methods can be obtained through merchants, agents and materials.
Think so much for the time being.