According to the European Telecommunications Standards Institute's (ETSI) intellectual property rights (IPR) database, about 50 companies have declared, as of March 2012, holding essential patents covering the LTE standard.
根据欧洲电信标准协会（European Telecommunications Standards Institute，ETSI）知识产权库，至2012年3月，有约50 家企业已宣布拥有LTE标准中的必要专利。