Why do you have to apply for a patent to invent something? Why is there something patented?

Patent is the abbreviation of patent right, which is the right granted by the state to the applicant to monopolize, use and dispose of his invention and creation within a certain period of time according to the patent law.

With a patent, others must get your authorization when using the same technology. So you can charge a certain royalty.

Patents are mainly produced to protect the inventor's invention achievements. Will not be used by others for free. Thereby encouraging invention.