Why doesn't Nintendo charge royalties?

Nintendo does not charge royalties for the better development of the game market. According to Nintendo's official public information, Nintendo is authorized to protect it and does not charge patent fees. In order to make the game market develop better, Nintendo doesn't charge manufacturers for using related patented technologies, and all patented technologies on the game system are used free of charge. Nintendo is a Japanese company, mainly engaged in the development of video game software and hardware.