Plaintiff
3 cases as plaintiff.
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Company overview. Corrigent Corporation is a U.S. patent-holding entity that owns networking patents originating with Israel's Orckit Communications Ltd. and its wholly owned subsidiary Corrigent Systems Ltd. (Orckit was founded in 1990 in Tel Aviv, listed on Nasdaq in 1996, and went through bankruptcy and liquidation in 2015; Corrigent Systems was formed in 2000). Corrigent Corporation itself shows no operational footprint; its Rule 7.1 disclosure in the Delaware suits states "No Parents or Affiliates Listed." I could not verify its incorporation date, headquarters, headcount, or revenue from public sources.
Products / services. It sells no products and operates no network. Corrigent Systems historically developed Carrier Ethernet + Transport (CE+T) switches and the CM-4000 packet transport family for metro aggregation, along with Resilient Packet Ring (IEEE 802.17) and circuit-emulation technology. Corrigent Corporation is a non-practicing entity that monetizes the inherited portfolio — cited in its complaints as hundreds of patents across roughly 70 families — through litigation. Unified Patents explicitly characterizes it as an NPE.
Patent-litigation posture. NPE asserting an acquired originator portfolio. All 12 tracked matters are consistent with that: three plaintiff suits filed April 19, 2022 (D. Del. against Arista and Dell; W.D. Tex., Waco Division against Cisco), and nine PTAB matters where it is patent owner/defendant. It has no defendant-side district court cases, confirming it is not an operating company.
Notable cases. The Waco filing, Corrigent Corp. v. Cisco Systems (6:22-cv-00396), placed one suit in a plaintiff-favorable venue. Asserted patents include the '369 (hidden failure detection), '431 (bandwidth assignment in logical network topologies), '400, '602, and '485 patents. Unified Patents filed IPR2022-01514 and an ex parte reexamination (granted July 14, 2023). In 2024, PTAB final written decisions found all challenged claims of one patent unpatentable (joint Dell/Cisco petition) and some challenged claims of another unpatentable. Former Orckit-Corrigent patents have also been asserted by other plaintiffs, including Orckit Corporation and Quicker Connections, against Cisco, Arista, and Juniper.
Sources: Wikipedia (Orckit-Corrigent); GlobeNewswire/TASE Orckit-Corrigent releases; Unified Patents insights; Delaware and W.D. Tex. dockets and complaints via CourtListener/Justia/RPX; PTAB IPR records.
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Corrigent sued Cisco alleging infringement of the '369 patent and related Corrigent patents. The court granted Cisco judgment on the pleadings that the '369 and '485 claims were patent-ineligible under § 101, entered final judgment for Cisco, and Corrigent recovered $0; the judgment also addressed the '400, '602, and '431 patents.
Corrigent sued Dell Technologies Inc. and Dell Inc. in D. Del. alleging infringement of the '369 patent and related Corrigent patents. The court dismissed a single claim on March 3, 2023, and issued claim construction on May 29, 2024; the case was ongoing at last report.
Corrigent sued Arista Networks, Inc. in D. Del. alleging infringement of the '369 patent and related Corrigent patents. The court issued claim construction on May 29, 2024; the case was pending at last report.