Defendant
15 cases as defendant.
Keysight Technologies, Inc. is a publicly traded company (NYSE: KEYS) that designs and manufactures electronic test and measurement equipment and software. Headquartered in Santa Rosa, California, the company was founded on November 1, 2014, as a spin-off from Agilent Technologies, which itself originated from Hewlett-Packard. For its 2023 fiscal year, Keysight reported revenues of $5.46 billion and employed approximately 16,800 people as of 2025.
As a major operating company, Keysight provides a wide range of solutions across various industries, including communications, aerospace and defense, automotive, and semiconductors. Its product portfolio includes instruments such as oscilloscopes, network analyzers, signal generators, and spectrum analyzers, as well as electronic design automation (EDA) software under its PathWave brand. These tools are used by engineers in design, development, manufacturing, and network monitoring.
Keysight’s litigation profile is primarily that of an operating company defending itself against patent assertions. The tracked case data shows two instances of Keysight as a defendant and one as a plaintiff, all related to the same adversary. This pattern indicates a targeted defensive posture rather than that of a frequent litigant. When sued for infringement, the company has shown a willingness to challenge the validity of the asserted patents, a common strategy for operating companies.
The company's tracked patent cases all stem from a multi-forum dispute with cybersecurity firm Centripetal Networks, LLC. Centripetal initiated actions against Keysight in 2022 in the U.S. International Trade Commission and the U.S. District Court for the Eastern District of Virginia, alleging infringement by Keysight's network security products. In response, Keysight filed a proceeding at the USPTO's Patent Trial and Appeal Board (PTAB) to challenge the validity of Centripetal's patents. In April 2026, the U.S. Court of Appeals for the Federal Circuit affirmed rulings from both the ITC and PTAB in favor of Keysight, clearing it of infringement claims and invalidating numerous asserted patent claims.
Centripetal appeals the PTAB's Final Written Decision in IPR2022-01421 finding all claims of the '009 patent unpatentable. The appeal was docketed April 30, 2025, and no merits decision has been confirmed.
Centripetal appealed the PTAB's IPR2022-01525 Final Written Decision invalidating all claims of the '526 patent. The Federal Circuit affirmed the Board's unpatentability findings in a non-precedential decision.
Centripetal appealed the PTAB's final written decision in IPR2022-01535. The appeal was voluntarily dismissed under Fed. R. App. P. 42(b) on January 14, 2025, without a merits ruling, and the mandate issued January 29, 2025.
Centripetal Networks appealed the PTAB's initial decision in IPR2022-00182 (and related IPRs) concerning US9917856. The Federal Circuit vacated the decision and remanded the case for further proceedings, citing the PTAB's failure to adequately consider evidence of copying.
The investigation was terminated based on the PTAB's decision to institute IPR proceedings, which cast significant doubt on the patent's validity.
This case was stayed pending the outcome of inter partes review (IPR) proceedings. Following a CAFC decision finding the patent unpatentable, the case is subject to dismissal.
Patent infringement suit filed by Centripetal against Keysight, listed as involving the '474 patent. It was intradistrict-transferred from the Alexandria Division to the Norfolk Division on Jan. 4, 2022; the final merits disposition is not confirmed in the retrieved sources.
Centripetal sued Keysight for patent infringement involving a portfolio including the '009 patent. The case was stayed pending finalization of appeals of ITC findings and USPTO validity challenges, including IPR2022-01421.
Centripetal sued Keysight for patent infringement in the Eastern District of Virginia. The case was stayed pending finalization of appeals of ITC findings and validity challenges. Google Patents associates this case with the '062 patent, though the exact asserted patents were not fully confirmed in the available sources.
Companion Virginia action filed by Centripetal against Keysight, initially docketed in the Alexandria Division and transferred to the Norfolk Division on January 4, 2022. It was stayed alongside the related Virginia action pending appeal outcomes.
Centripetal sued Keysight in the Eastern District of Virginia, with the '343 patent associated with the case alongside other Centripetal patents. The district case was related to ITC Investigation No. 337-TA-1313 and was stayed. The full set of patents ultimately asserted was not confirmed.
Centripetal Networks, Inc. filed a second, broader suit against Keysight Technologies, Inc. in E.D. Va. Keysight challenged eight Centripetal patents at the PTAB, with most or all claims invalidated and appeals continuing into 2026. The narrative does not identify which patents were asserted in this case or whether the '401 patent was involved.
Centripetal sued Keysight and IXIA asserting the '370 patent along with U.S. Patent Nos. 9,137,205, 9,413,722, and 9,560,077. A jury trial was held October 2-5, 2018; the parties filed a joint stipulation of dismissal on October 11, 2018, consistent with a settlement, and the case was terminated.
Centripetal sued Keysight and Ixia in the Eastern District of Virginia. The '213 patent was added by amended complaint on June 13, 2018. The case was litigated through claim construction and trial, but the final damages or settlement figure was not confirmed.
Centripetal appealed the ITC's no-violation determination in Inv. No. 337-TA-1314. Centripetal did not appeal the Commission's invalidity/non-infringement findings on the '526 patent, so the appeal concerned the other asserted patents, U.S. Patent Nos. 10,193,917 and 9,264,370.