Defendant
6 cases as defendant.
Marlin Semiconductor Ltd. is an Irish non-practicing entity (NPE) specializing in patent licensing and assertion. Formed in Ireland in 2020 as Sandyford Semiconductor Limited, it changed its name to Marlin Semiconductor in January 2021. The company is headquartered in Dublin and is an affiliate of IPValue Management (d/b/a IPValue), a U.S.-based patent monetization firm owned by private equity firm Vector Capital. Marlin Semiconductor operates as a holding company with no manufacturing or research and development operations.
The company does not produce goods or services. Instead, its sole business is the monetization of a large patent portfolio acquired from a major operating company. In June 2021, Marlin acquired over 480 U.S. patents from United Microelectronics Corporation (UMC), one of the world's largest semiconductor foundries. The total worldwide portfolio acquired from UMC includes over 800 patents and applications related to a wide range of semiconductor technologies, including fabrication processes, device structures, circuits, and packaging. IPValue and its affiliate, Longitude Licensing Ltd., conduct the licensing campaigns for this portfolio.
Marlin Semiconductor is a patent assertion entity. Although the provided case data only lists one defensive appearance at the Patent Trial and Appeal Board (PTAB), this is a direct result of the company's recent assertion activities. In early 2025, Marlin and Longitude Licensing initiated a significant litigation campaign, suing major technology companies in plaintiff-friendly venues. Lawsuits were filed in the Western District of Texas against Apple, Broadcom, and Qualcomm, and in the Eastern District of Texas against Lenovo, OnePlus, and TSMC.
The company’s most prominent legal actions include its district court complaints and a parallel investigation at the U.S. International Trade Commission (ITC), which seeks to block imports of allegedly infringing semiconductor devices and downstream products like smartphones and computers. In response to these assertions, companies including TSMC and Apple have filed petitions for inter partes review (IPR) at the PTAB, challenging the validity of the asserted patents. The single case in the provided database, Unified Patents, LLC v. Marlin Semiconductor Ltd., is another such validity challenge, filed by an organization that defends against NPE litigation.
Unified Patents, as the petitioner, initiated an Inter Partes Review (IPR) against Marlin Semiconductor Ltd, the patent owner, concerning US patent 7888195.
Multiple petitioners including Taiwan Semiconductor Manufacturing Company Limited, Apple, Inc., Broadcom, Inc., and Qualcomm, Inc. filed an Inter Partes Review petition against Marlin Semiconductor Ltd, the patent owner of US Patent 7745847, which has been instituted by the PTAB.
An Inter Partes Review (IPR) was filed by TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LIMITED, APPLE, INC., BROADCOM, INC., and QUALCOMM, INC. against Marlin Semiconductor Ltd concerning US patent 9093473. The PTAB did not institute the review due to procedural reasons.
An Inter Partes Review (IPR) initiated by Unified Patents challenging US patent 6888181, owned by Marlin Semiconductor Ltd. The Patent Trial and Appeal Board (PTAB) issued a judgment granting adverse judgment against the patent owner on May 13, 2026, concluding the case.
Unified Patents filed an Inter Partes Review (IPR) challenging the validity of US Patent 9318609, which is currently pending before the Patent Trial and Appeal Board.
An Inter Partes Review (IPR) was filed against US patent 8076194, owned by Marlin Semiconductor Ltd, and is currently pending before the PTAB.