It is related to the applied professional technology and the writing quality of patent application documents. It can only be said that the authorization rate of invention patents is lower than that of utility model patents and design patents. It is difficult to count the success rate of the whole large-scale invention patent application, but there are generally statistics on the authorization rate of invention patents represented by various agents. The reason why the invention patent authorization rate is relatively low is because:

An invention granted a patent right shall be novel, creative and practical.

An application for a patent for invention has to go through five stages: acceptance, preliminary examination, publication, substantive examination and authorization/rejection, while an application for a patent for utility model and a patent for design only needs to go through three stages: acceptance, examination and authorization/rejection. Invention patents need substantial examination before they can be authorized, so they have the highest technical content among the patent types in China.

Invention patents and utility model patents are also new technical solutions to be protected. The examination of invention patents takes a long time and costs a lot, but the status is relatively stable after authorization, and the protection period is 20 years from the date of application (some information comes from the Patent and Trademark Office of Zhong Yi, Shenzhen).