legal ground
Article 26 of the patent law
The design granted the patent right does not belong to the existing design; Before the filing date, no unit or individual has filed an application with the patent administration department of the State Council for the same design, and it is recorded in the patent documents published after the filing date.
Compared with the existing design or the combination of existing design features, the patented design should have obvious differences.
A design that has been granted a patent right shall not conflict with the legal rights that others have obtained before the date of application.