When does the protection period of the invention patent right begin?

It starts from fixed dates, such as filing date, priority date and authorization announcement date.

The term of protection of an invention patent is calculated from the date of application. The term of an invention patent is generally 20 years, which may be longer than other patents. The application process of invention patent itself is complicated and the pass rate is not high. Many people are ready to be returned when they apply for invention patents, which is very innovative for themselves.