Appearance design is the appearance design of a product and must be combined with the product; Therefore, option A is stated correctly and is not selected. Neither utility model nor design patent application will be examined in substance, and option B is correctly stated, so it is not selected. The design protection period is l0 years, counting from the date of application, so option D is correct and not selected. Patents for inventions and utility models may be compulsory, but designs cannot be compulsory. So option c is misstated and selected.
[Problem solving skills] Design is not very important. There is no need to use other people's designs, and it may not be of much benefit to society. Therefore, there is no compulsory licensing system for design.