I have a patent. What kind of business should I start?

There is no necessary connection between owning a patent and starting a business.

If you want to ask, what kind of company can be established to better play the value of this patent? Then, it is definitely feasible to set up an enterprise whose main business technology is closely related to patented technology.

If the patent is a product, or the processing method of the product, etc. , it must be a processing enterprise. If the patent is a design, it is more appropriate to use this design to produce and sell products.