And the last invention patent you mentioned. This is the most difficult application. First, the patent office will conduct formal examination, and then it will conduct substantive examination, which will take a long time. Moreover, the restrictions on invention patents are very strict, and it is not easy to apply. Therefore, if an invention patent can be declared, its gold content is very large.
The patent number applied for is a patent number, but it is not necessarily an invention patent. This should be clear. For example, the package of a food says "national patent has been applied for, and the patent number is * * * * * * * *", which is the number of the appearance patent in this case.