What is the sign of patent?

According to the Measures for Marking Patent Marks, if a patent mark is marked, the following contents shall be marked:

(a) indicate the categories of patent rights in Chinese, such as China invention patent, China utility model patent and China design patent;

(2) Patent number granted by China National Intellectual Property Administration.

In addition to the above contents, the annotator may attach other text and graphic marks, but the attached text and graphic marks and their marking methods shall not mislead the public.