What are the specific types of patent licensing?

Patent license mainly includes the following types: (1) exclusive license. The abbreviation of "exclusive license" means that within a certain period of time, within the geographical scope where the patent right is valid, the patentee only permits one licensee to exploit the patent, and the patentee himself may not exploit the patent. Because the exclusive license of patent exploitation is the exclusive exploitation right granted to the licensee in a certain area and within a certain period of time, the technology use fee of the exclusive license is much higher than that of other license forms. (2) Exclusive license. The abbreviation of "exclusive license", also known as "exclusive license", means that within a certain period of time, within the geographical scope where the patent right is valid, the patentee only permits one licensee to exploit his patent, but the patentee himself has the right to exploit the patent. The difference between an exclusive license and an exclusive license is that the patentee of an exclusive license has the right to exploit the patent himself, but the patentee of an exclusive license cannot exploit the patent himself. In general, the exclusive license fee is lower than the exclusive license fee. (3) General licensing. Referred to as "general license", it means that within a certain period of time, the patentee licenses others to exploit his patent, while retaining the right to license a third person to exploit the patent. In this way, in the same area, there may be several licensees at the same time and the patentee himself can still implement it. General license is the most common way of patent license. The general implementation license is applicable to the case of large market capacity. (4) sub-licensing. Referred to as "sub-license", that is, the licensee licenses a third person to exploit the same patent according to the agreement with the patentee, and the exploitation license between the licensee and the third person is sub-license. The licensee must obtain the consent of the patentee before signing such a sub-licensing contract. Sub-licensing generally applies to the case that the original license is exclusive.