But you cannot apply for a utility patent, also known as an invention patent. The term of a utility patent in the United States is twenty years, and can be extended accordingly due to delays in the review process or filing with the FDA for drug patents. However, UI patents are not authorized in China because the "Patent Examination Guidelines" stipulate that patterns that appear when electricity is turned on cannot be protected. In addition, UI patents in Japan need to be attached to corresponding entities, such as mobile phones.