What does it mean to safeguard patent rights? The patent right has been repeatedly granted.

Patent maintenance means that the patent has been certified, authorized and maintained, and an annual fee needs to be paid every year. If you don't pay the annual fee, the patent will be invalid.

Patent duplication authorization is not just two inventions. Because the technical scheme composed of main technical features is basically the same or equivalent, each patent application is authorized. Repeated patent authorization not only infringes on the exclusivity of patents, but also destroys the price balance mechanism of patent "contract" between inventors and the state or the public.