First, there must be at least one prior patent application, secondly, when applying for another patent, and thirdly, the two patents must have the same content. The subsequent patent application must be filed within 12 months from the filing date of the previous patent application, otherwise priority cannot be claimed. After a later application is granted priority, its filing date is the same as the filing date of the previous patent application, which is the right of priority.
Note: The content of the subsequent application must be the same as the content of the previous application in order to enjoy priority, and different parts cannot enjoy priority.
It can be seen that the number of times you can claim priority is related to the number of times you apply for a patent. For a patent application, if there are several previous patent applications with related content, you can claim the priority of several patents. , but it must be submitted once. As long as you apply for several patents within the specified time limit, you can apply for several priority rights.