legal ground
Article 26 of the Patent Law Where an applicant applies for a patent for invention or utility model, he shall submit a written request, a specification and its abstract, a patent claim and other documents. Article 27 To apply for a patent for design, a written request, a picture or photograph of the design, a brief description of the design and other documents shall be submitted. The relevant pictures or photographs submitted by the applicant shall clearly indicate the design of the product for which patent protection is required. Article 42 From the date of filing, the term of patent right for invention is 20 years, that for utility model is 10 year, and that for design is 15 year.