Patent applications are divided into three categories, namely, invention patents, utility model patents and design patents. Among them, invention patents need preliminary examination and patent substance examination, while utility model patents and design patents only need preliminary examination. Therefore, the examination time of invention patents is longer than that of utility model patents and design patents, and the authorization is relatively more difficult, but invention patents are the most recognized, valuable and stable technology patents.
So generally speaking, the value of invention patents is higher.