My uncle wants to apply for a patent in the industrial and commercial bureau and find out how to apply for domestic patent priority.

The earlier application refers to the application between the filing dates, and the application after the filing date is the later application. The novelty and creativity of patent examination are based on the date of application. Other related patents before the filing date (earlier application) can affect three characteristics of your patent. And any patent after the filing date cannot affect the three characteristics of your patent. Simply put, a technology or invention was not patented in time, and it was stolen and used by others after a while. At this time, if both parties apply for a patent, then the person who uses the patent first will have priority and get the patent right of this technology, while the other person will not get the patent right of this technology. Therefore, to apply for a patent, as long as you have ideas and innovations, you must apply as soon as possible.