Automobile sales companies are only responsible for automobile sales activities, not automobile production, and patents will only be used in automobile production research and development activities. Car sales companies only sell cars and are not responsible for production and research, so there is no patent.
In modern times, patents are generally documents issued by government agencies or regional organizations representing several countries according to their applications. This kind of document records the contents of the invention and creation, and in a certain period of time, it has produced such a legal state, that is, under normal circumstances, patented inventions and creations can only be implemented by others with the permission of the patentee.