InterDigital Madison Patent Holdings SAS

InterDigital Madison Patent Holdings SAS is a French société par actions simplifiée (simplified joint stock company) based in Paris, France. It operates as a wholly-owned subsidiary of InterDigital, Inc., a publicly traded American technology research and development company (NASDAQ: IDCC) headquartered in Wilmington, Delaware, founded in 1972. InterDigital, Inc. had revenues of $869 million in 2024 and approximately 430 employees.

While InterDigital Madison Patent Holdings SAS is noted for providing property leasing services, its parent company, InterDigital, Inc., is a global research and development firm specializing in wireless, visual, and related technologies. InterDigital, Inc. designs and develops advanced technologies that enable connected experiences across various communications and entertainment products and services. Its primary revenue comes from licensing its extensive patent portfolio, which consisted of approximately 34,000 patents and patent applications worldwide as of 2024, related to cellular wireless standards (3G, 4G, 5G), Wi-Fi, and various video technologies like HEVC and VVC.

InterDigital Madison Patent Holdings SAS is primarily involved in patent monetization. Although the provided case data shows one appearance as a defendant at the Patent Trial and Appeal Board (PTAB) in a case brought by Unified Patents, the company, along with other InterDigital subsidiaries, has been an active plaintiff in patent infringement actions in other venues. For example, in late 2025, InterDigital Madison Patent Holdings SAS initiated an infringement action against Amazon at the Unified Patent Court in Germany, concerning a patent related to image block coding. This demonstrates a posture of actively asserting its intellectual property.

A notable context for InterDigital Madison Patent Holdings SAS and its parent company is their broader involvement in standard-essential patent (SEP) licensing. InterDigital, Inc. has acquired significant patent portfolios, including those from Technicolor and elements from Sony and Panasonic, bolstering its position in video processing, encoding/decoding, and display technology. The parent company's revenue is largely driven by fixed-fee patent license agreements, with major licensees historically including companies like Samsung, Apple, and LG Electronics. The single tracked PTAB case, Unified Patents v. InterDigital Madison Patent Holdings SAS, indicates that some of its patents are being challenged by an entity known for filing inter partes reviews against asserted patents. Additionally, InterDigital Madison Patent Holdings SAS is a co-defendant in a significant antitrust lawsuit filed by Disney Enterprises, Inc. in the U.S. District Court for the District of Delaware, alleging abusive patent-licensing practices and unlawful monopolization related to video encoding and decoding patents.