Put multiple patents with cross-licensing objects into a whole license, and the formed intellectual property aggregate is called patent pool; Patent pool is a patent licensing trading platform composed of patentees; The patent license between patentees on the platform is horizontal license; The license granted to a third party is a vertical license.
For example, the first patent is ABC, the second patent is ADF, the third patent is BEG, and the fourth patent is CFH ... These patents overlap to some extent. In order to facilitate the use of all rights holders, it is necessary to realize horizontal license, while the license for others who are not in the patent pool is vertical license.