Where can I find the patent of the European Patent Office?

The first one is used to inquire about patents applied in the European Patent Office; The second one is used to inquire about patents applied worldwide (including the United States, China, etc.). ); The third one is used to inquire about patents filed with the World Patent Organization. As you can see, the second query has the largest scope. Generally speaking, the patents published by the world patent organization are all applied through PCT, and the number begins with wo; If the application is not made through the PCT, the number begins with a specific country code (such as the United States). For details, please refer to the website of the State Patent Office () and other related websites.