What is the relationship among inventor, applicant, patentee and patent?

Inventors are people who make direct contributions to innovation. The applicant can be an inventor or an inventor. The patentee applies for authorization, and the applicant is the patentee. The patentee is consistent with the patentee: the right to apply for a patent is the basis of a patent, and the patentee becomes the patentee after the patent application filed by the patentee is approved. The applicant and the inventor may or may not be the same person. For example, if you apply for a patent for an invention made to complete the company's task, the company should be a legal person applicant. If the patent is authorized, the company is the patentee. Patent authorization must be granted to the applicant. Patent inventors can only be individuals, not units, and enjoy the right to be rewarded and signed, but they have no right to use, possess or dispose of the patent alone, only to change it and not to transfer it; Patent applicants or patentees can be individuals and units, with exclusive rights (exclusive exploitation of this patent), licensing rights (licensing others to exploit this patent) and transfer rights (patent application rights and patent rights can be transferred).