InterDigital, Inc. designs and develops technologies that enable and enhance wireless communications in the United States and internationally. It offers technology solutions for use in digital cellular and wireless products and networks, such as 2G, 3G, 4G, and IEEE 802-related products and networks. The company develops cellular technologies comprising technologies related to CDMA, TDMA, OFDM/OFDMA, and MIMO for use in 2G, 2.5G, and 3G wireless networks and mobile terminal devices; and other wireless technologies related to Wi-Fi, WLAN, WMAN, WRAN, and the digital cellular area. Its patented technologies are used in various products, including mobile devices, such as cellular phones, tablets, notebook computers, and wireless personal digital assistants; wireless infrastructure equipment comprising base stations; and components, dongles, and modules for wireless devices. As of December 31, 2014, the company held a portfolio of approximately 20,500 patents and patent applications related to the fundamental technologies that enable wireless communications. InterDigital, Inc. was founded in 1972 and is headquartered in Wilmington, Delaware.