Is the copyright certificate unique to the manufacturer? Can other companies have it? Is the patent certificate unique to a company? Can other companies have it?

The copyright belongs to the author, and the publishing house can publish and sell the works after purchasing. And presents. No money.

Other companies can also buy copyright from the author, but they didn't have a single edition in their previous contracts.

A patent can be an individual or an organization. Other companies can only obtain patents by purchasing. Do not use it without authorization.