Technical standards in the mobile communications industry have been developed from national to regional and from regional to global. In the current era, global standards in the industry have enabled the formation of a single global market. However, because standard essential patents (SEPs) are territorial given the nature of the patent system, they can function as an opportunity or a threat depending on whether or not they are protected in countries of interest. This paper investigates how W-CDMA and LTE SEPs owned by East Asian countries are globally distributed. From the analysis, the current study discovers East Asian SEP owners’ strategies, future opportunities, and threats in their international businesses.