What content should be indicated when marking patent marks and patent numbers
1. Use Chinese to indicate the category of patent rights, such as China invention patent, China utility model patent, China design patent;
2. The patent number granted by the State Intellectual Property Office, where "ZL" means "patent", and the first and second digits indicate the submitted patent In the year of application, the third digit indicates the patent category, and the fourth and subsequent digits are the serial number and computer check digit. In addition to the above content, the annotator may add other text and graphic marks, but the additional text, graphic marks and their marking methods shall not mislead the public.
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