Untitled case

This patent infringement litigation, case number 8:24-cv-00974, was initiated by Skyworks Solutions, Inc., a prominent operating company specializing in semiconductor products, particularly front-end modules (FEM) for Wi-Fi communication. The plaintiff, a "Wi-Fi FEM heavyweight," filed suit on May 6, 2024, in the United States District Court for the Central District of California. The defendants include Kangxi Communication Technologies Shanghai Co., Ltd., its U.S. affiliate Grand Chip Labs, Inc., network equipment maker Ruijie Networks Co., Ltd., and D-Link Corporation along with its U.S. subsidiary D-Link Systems, Inc.. These defendants are also operating companies involved in the chip and networking equipment industry. Skyworks alleges that the defendants are infringing its intellectual property through their Wi-Fi 6 and Wi-Fi 6E front-end module products and chipsets.

The lawsuit asserts four U.S. patents: US9,917,563 B2, US9,450,579 B2, US9,148,194 B2, and US8,717,101 B2. These patents collectively cover aspects of front-end module (FEM) technology. Specifically, U.S. Patent No. 9,148,194, titled "Package with multiple discrete components," generally describes an apparatus including a package substrate and multiple discrete semiconductor components mounted thereon, interconnected to form a communication module, such as a power amplifier. The procedural posture saw the case initially assigned to Judge Dean D. Pregerson, then reassigned to Judge Fred W. Slaughter in the Central District of California. The case was notably stayed on September 13, 2024, after only 130 days, without any substantive rulings on infringement or validity.

This case is significant due to the involvement of Skyworks Solutions, a major player in the Wi-Fi FEM market, actively enforcing its patent portfolio against competitors in the rapidly evolving Wi-Fi 6 and 6E technology space. The short duration before the case was stayed suggests potential confidential settlement discussions or the parties awaiting developments in parallel proceedings. Indeed, Skyworks had also filed a parallel complaint in the International Trade Commission (ITC) (337-TA-1413) asserting infringement of the same patents, which often influences district court litigation. Furthermore, some of the asserted patents, including US9,917,563 and US8,717,101, have been the subject of inter partes review (IPR) proceedings at the Patent Trial and Appeal Board (PTAB), indicating a multi-front litigation strategy and challenges to patent validity. While the specific IPR status for 9,148,194 is not explicitly detailed in the search results, its inclusion in this campaign suggests it too could face or be involved in similar challenges.

Patent Infringement Litigation: Skyworks Solutions, Inc. v. Kangxi Communication Technologies (Shanghai) Co., Ltd., et al.

Case Number: 8:24-cv-00974
Court: U.S. District Court for the Central District of California
Patents at Issue: U.S. Patent Nos. 9,148,194; 9,917,563; 9,450,579; and 8,717,101.

This patent infringement lawsuit, filed in the Central District of California, saw an early stay, preventing substantive legal developments on the merits in the district court. Parallel inter partes review (IPR) proceedings have been initiated at the Patent Trial and Appeal Board (PTAB) for at least one of the asserted patents.

Key Legal Developments:

• Filing & Initial Pleadings (2024-05-06): Skyworks Solutions, Inc. ("Skyworks") filed a complaint for patent infringement on May 6, 2024, in the U.S. District Court for the Central District of California. The complaint named Kangxi Communication Technologies (Shanghai) Co., Ltd., its U.S. affiliate Grand Chip Labs, Inc., network equipment maker Ruijie Networks Co., Ltd., and D-Link Corporation along with its U.S. subsidiary D-Link Systems, Inc. as defendants. Skyworks asserted four U.S. patents: 9,917,563; 9,450,579; 9,148,194; and 8,717,101, all related to front-end module (FEM) technology for Wi-Fi 6 and Wi-Fi 6E chipsets and modules.

  • A First Amended Complaint was filed on July 16, 2024.
  • No answers or counterclaims were publicly identified as filed before the case was stayed.

• Pre-Trial Motions of Substance – Case Stayed (2024-09-13): The district court case was stayed on September 13, 2024, approximately 130 days after its filing. The public record does not specify the precise grounds for the stay, but such early stays often indicate pending inter partes review (IPR) petitions, co-pending International Trade Commission (ITC) proceedings, or a bilateral agreement between the parties to pause litigation. The stay was granted before any scheduling order or claim construction proceedings. The court did issue an order granting a seal application concerning Skyworks' ex parte service application against foreign defendant Ruijie Networks, which was characterized as a "housekeeping measure" and not a merits ruling.

• Claim Construction (Markman) Outcomes: No Markman hearing or claim construction order was issued in the district court case due to the early stay. However, references to a Markman brief in a related ITC investigation (Inv. No. 337-TA-1413) appear in filings for parallel PTAB proceedings.

• Discovery Milestones: There is no public record of significant discovery milestones in the district court case due to the early stay of proceedings. The case was stayed pre-answer.

• Trial Events, Verdict, and Post-Trial Motions: The case did not proceed to trial, verdict, or post-trial motions as it was stayed at an early stage.

• Settlement, Dismissal, Judgment, or Appeal: The case's current posture in the district court is "Stayed." This means no substantive verdict on infringement or validity was entered, and no final judgment or dismissal on the merits has occurred.

• Parallel PTAB IPR/PGR Proceedings:

  • IPR2025-00373 (2025-01-13): Kangxi Communications Technologies (Shanghai) Co., Ltd. filed an IPR petition against Skyworks Solutions, Inc. challenging U.S. Patent No. 9,917,563. This IPR proceeding specifically references the district court litigation (8:24-cv-00974).
  • IPR2025-00372 (2025-01-14): Another IPR petition was filed by Kangxi Communication Technologies (Shanghai) Co., Ltd. against U.S. Patent No. 9,917,563, also citing the parallel district court litigation. The petition highlighted that the district court litigation was "stayed in its infancy (pre-answer) and thus is far behind the PTAB schedule," arguing against discretionary denial.
  • Federal Circuit Mandamus Petition (2025-11-24): Kangxi Communication Technologies (Shanghai) Co., Ltd. filed a petition for a writ of mandamus with the Federal Circuit concerning IPR2025-00372 and IPR2025-00373. This petition challenged the USPTO Director's application of "settled expectations" and "parallel ITC action" rules for discretionary denials of IPRs.

As of the current date, the district court case remains stayed, with no final resolution on the merits. The parallel IPR proceedings continue to be a significant development impacting the asserted patents.

Here's an analysis of the counsel of record representing the plaintiff(s) in case 8:24-cv-00974:

Plaintiff: Skyworks Solutions, Inc.

Counsel:

• Name: Joseph F. Haag

  • Role: Counsel for Plaintiff (appeared pro hac vice)
  • Firm: Wilmer Cutler Pickering Hale & Dorr LLP
  • Office Location: To be determined.
  • Relevant patent litigation experience/notable past cases: To be determined.

• Name: Kate M. Saxton

  • Role: Counsel for Plaintiff (appeared pro hac vice)
  • Firm: Wilmer Cutler Pickering Hale & Dorr LLP
  • Office Location: To be determined.
  • Relevant patent litigation experience/notable past cases: To be determined.

The initial docket information indicates that both Joseph F. Haag and Kate M. Saxton of Wilmer Cutler Pickering Hale & Dorr LLP appeared pro hac vice for Skyworks Solutions, Inc.. However, the specific office locations for these attorneys and detailed information about their patent litigation experience or notable past cases are not available in the provided search results. Further investigation into their firm profiles or specific litigation records would be needed to complete these details. The case was filed on May 6, 2024, and was subsequently stayed on September 13, 2024. The public record does not disclose the precise basis for the stay.

Counsel of Record for Defendants in Skyworks Solutions, Inc. v. Kangxi Communication Technologies Shanghai Co., Ltd. et al.

As of the current date (June 16, 2026), the patent infringement case 8:24-cv-00974, filed in the California Central District Court, is stayed. The plaintiff in this case is Skyworks Solutions, Inc., and the defendants are Kangxi Communication Technologies (Shanghai) Co., Ltd., Grand Chip Labs, Inc., and Kangxi Communication Technologies Shanghai Co., Ltd..

A thorough review of publicly available docket information does not clearly identify the counsel of record specifically representing the defendants in this particular District Court case (8:24-cv-00974). While related proceedings, such as a Federal Circuit case involving "Kangxi Communication Technologies (Shanghai) Co., Ltd." as a petitioner (Case No. 25-134), mention "Counsel for Petitioner Kangxi Communication Technologies (Shanghai) Co., Ltd.", this is a different case and court. Without direct PACER access to the detailed docket entries for 8:24-cv-00974, specific appearances for the defendants in this stayed District Court matter are not readily ascertainable through general web searches. It is possible that filings are sealed, or formal appearances by defense counsel were limited due to the early stay of the case.