10. Under the R.O.C. Patent Act, which of the following descriptions regarding utility model patent is incorrect? (A)"Utility model" means the conception of technical ideas relating to the shape or structure of an article or combination of articles or processes, utilizing the laws of nature. (B) The term of a utility model patent shall expire after a period of ten years starting from the filing date. (C) When exercising a utility model patent, the patentee shall not make a warning without presenting the technical evaluation report of the utility model patent. (D) Where a utility model patent is revoked, the patentee shall be liable for the damages suffered by another person due to the patentee’s exercise of utility model patent right prior to its revocation. The above shall not apply if such exercise is based on the content of the technical evaluation report of utility model patent and carried out with due care.