E&S International Enterprises (d/b/a ESI Enterprises) (2:25-cv-10526) is the latest defendant to be added to the sole litigation campaign of Control Sync Systems, LLC (CSS). In the new Central District of California complaint, the plaintiff asserts a single patent generally related to controlling the "video and audio parameters of a display device and a play device". The plaintiff targets the provision of TVs (i.e., the 4K UHD HDR Roku Smart LED TVs) that are compliant with the HDMI-CEC (High-Definition Multimedia Interface - Consumer Electronics Control) standard, which allegedly "enables connected devices to communicate with each other over HDMI cables".
Comprising a family of one, the asserted patent (7,812,889) issued to Coretronic in October 2010 with an estimated priority date in July 2005 (based on the filing of a foreign application). Coretronic assigned the '889 patent to CSS on October 14, 2024. The attachment to the assignment record reads in relevant part, "For good and valuable consideration, the receipt of which is hereby acknowledged, and the terms herein being incorporated into the Patent Transfer Agreement signed by Coretronic Corporation and Patent Asset Management Advisors, LLC".
Patent Asset Management Advisors, LLC (PAMA) was formed in Florida in March 2019 by Leigh M. Rothschild, a prolific inventor who has turned to patent monetization over the past decade. A shift occurred in 2017, when Rothschild formed Patent Asset Management, LLC (PAM) in Florida. Per state records, Rothschild is the manager of PAM (as well as of PAMA), an arrangement previously confirmed in deposition testimony given during the course of a state court action filed by former Rothschild colleague Constance Kazanjian against Rothschild and various of his controlled entities. An entry point for coverage is provided at "Wyoming Plaintiff Sues over Former Coretronic Patent" (September 2025).
CSS was formed in Wyoming on September 18, 2024. Across its litigation campaign, the plaintiff has filed contradicting court disclosures, sometimes disclosing that it has no parent corporation and that no publicly traded corporation owns ten percent or more of its stock, and other times, disclosing that PAM is its parent company. See "Control Sync's Third Corporate Disclosure Contradicts Its Other Three" (October 2025) for more on those discrepancies. In connection with the new Central California case, it has listed, among parties with a financial or nonfinancial interest in the outcome of the case, PAM, Direction IP Law, and SML Avvocati.
CSS launched this, its sole litigation campaign in August 2025 with a case against Sony, followed by LG Electronics (LGE) and Walmart (VIZIO) in September and TCL (TTE Technology) in October 2025. To date, each case remains ongoing. In the Sony case, District Judge Rodney Gilstrap has granted Sony's unopposed motion to transfer the case to the District of New Jersey. The remaining defendants have yet to answer or file a response to their respective complaints.
The new case has been assigned to District Judge Anne Hwang; Direction IP Law and SML Avvocati represent the plaintiff in litigation. A one-page assessment of this litigation can be found on RPX Insight here. 11/2, Central District of California.
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