There is only one patent number.

Look at which country the patent belongs to (for example, CN stands for China and US stands for the United States), and then determine the patent type (invention, utility model, design? ), and finally to the intellectual property office of the corresponding country or from the website of the European Patent Office. Not all patent numbers can be found in the claims, and American provisional patents can not be found on the website of the US Patent Office. Sometimes the priority number may be mistaken for the patent number, and it is generally not found on the website.