During the validity period of the patent right after the patent right is granted, the patentee may mark the patent mark and patent number on his patented product, the product directly obtained according to the patent method or the packaging of the product.
Where the patent mark and patent number are 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) The patent number of the patent granted by China National Intellectual Property Administration, in which "ZL" means "patent", the first and second digits indicate the year when the patent application was filed, the third digit indicates the patent category, and the fourth digit is the serial number and computer check digit.
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.