1, you can make a general query in the public database of China National Intellectual Property Administration Network;
2. Analyze the types of patents to be queried. In China, there are three types of patents: invention, utility model and appearance patent. Only when the type of patent is determined can it be inquired.
3. If there is a patent number/application number, you can directly enter it in the column of patent number/application number.
If it is really unclear, you can entrust a professional patent agency (such as Zhuanzhihui and Gaohang). ) make a professional inquiry.