==Patent Pools==
Patent pools are agreements between "two or more patent owners to share, or cross-license one or more of , their own patents to with one another or to third parties." [http://www.wipo.int/export/sites/www/ip-competition/en/studies/patent_pools_report.pdf (WIPO)] Generally, patent pools cover mature and complex technologies that require complementary patents to develop compatible products and services. [http://www.wipo.int/export/sites/www/ip-competition/en/studies/patent_pools_report.pdf (WIPO)]. Complementary patents are patents that are must be used together for the development of a specific new product, and therefore, necessitate shared licensing [http://www.wipo.int/export/sites/www/ip-competition/en/studies/patent_pools_report.pdf (WIPO)].
More recently, the Department of Justice (DOJ) has taken steps to standardize patent pools in order to prevent violations of antitrust laws. The DOJ requires the following characteristics for a patent pool:
===Support===
'''Efficiency''': The creation of patent pools mainly benefits the owners of complementary or essential patents. Complementary patents cover multiple technologies protected by separate patents required for the development of a specific new product, and therefore, necessitate shared licensing [http://www.wipo.int/export/sites/www/ip-competition/en/studies/patent_pools_report.pdf (WIPO)]. Cross-licensing between companies in a patent pool facilitates building upon previous technologies and increases the efficiency of innovation by organizing complementary intellectual property assets under one contract [http://www.wipo.int/export/sites/www/ip-competition/en/studies/patent_pools_report.pdf (WIPO)]. Mutually blocking patents often slow technological developments as neither party can make use of its technology without infringing on the other party's patent. By forming a patent pool, both parties can develop substitute technologieswithout risk of infringement.
'''Cost Reduction''': Companies can also reduce the amount spent on litigation by settling disputes with the creation of patent pools. This would benefit small- and medium-sized businesses that usually cannot afford the costs of expensive litigation. [http://www.wipo.int/export/sites/www/ip-competition/en/studies/patent_pools_report.pdf (WIPO)] Transaction costs as well as royalties can also be lowered in a patent pool.