How to judge patent copy authorization

Mainly depends on whether the claim is consistent with the technical content, whether there is a difference, and whether the difference is creative, novel and practical. If there are no three characteristics in the difference, it is considered to be the same technology. It should be mentioned that if a patent can be derived from another patented technology, it is easy to think of, that is, if there is obviously no unexpected result compared with the original technology, it will not be examined, but returned.