Cisco Systems, Inc. v. WSOU Investments LLC

This Inter Partes Review (IPR) case, IPR2025-00241, involved petitioner Cisco Systems, Inc., a major operating company in networking hardware and telecommunications, and patent owner WSOU Investments LLC. WSOU is identified as a prolific non-practicing entity (NPE) or patent assertion entity (PAE), which operates under the d/b/a Brazos Licensing and Development. WSOU's business model involves acquiring extensive patent portfolios, primarily from Nokia and Alcatel-Lucent, and asserting them against large technology companies. The IPR was filed in response to a district court lawsuit where WSOU accused Cisco's networking products and services, including optical line systems and switching platforms, of infringement.

The sole patent at issue in this IPR was U.S. Patent 8,441,721, titled "Providing traffic class specific connection access for a broadband system." This patent generally describes methods and apparatuses for managing various traffic types with different quality of service requirements over broadband networks. The procedural posture for this case was an Inter Partes Review before the Patent Trial and Appeal Board (PTAB), initiated by Cisco on December 2, 2024. The PTAB serves as a specialized administrative tribunal for challenging patent validity, often employed by defendants in infringement suits. This particular IPR concluded with a settlement, meaning the parties reached an agreement outside of a full PTAB trial.

The case is notable within the patent litigation landscape due to WSOU Investments LLC's aggressive and widespread patent assertion strategy, often characterized as a "darken-the-skies" approach, involving hundreds of lawsuits against numerous technology companies. Cisco, in turn, has actively defended against these assertions, including filing multiple IPRs against WSOU's patents and achieving significant defensive victories in district court, such as jury verdicts of non-infringement and invalidity, as well as summary judgments. The settlement of this IPR reflects the ongoing strategic interplay between a major operating company and a prominent patent assertion entity, particularly in the context of telecommunications and networking technologies originating from former industry giants like Nokia and Alcatel-Lucent.

The legal developments in the patent dispute between Cisco Systems, Inc. and WSOU Investments LLC, including the specific Inter Partes Review (IPR) IPR2025-00241, trace back to district court litigation and involve multiple IPR proceedings.

Key Legal Developments and Outcome:

• 2021 – District Court Complaint Filed: WSOU Investments LLC, doing business as Brazos Licensing and Development, initiated a patent infringement lawsuit against Cisco Systems, Inc. in the U.S. District Court for the Western District of Texas, under case number 6:21-cv-00128 [ADA]. The complaint originally asserted infringement of five patents, with WSOU seeking nearly $50 million in damages. The patents initially asserted in this broader litigation included US Patents 7,443,859; 8,191,106; 8,665,733; 8,989,216; and 9,357,014.

• Pre-February 2025 – District Court Pre-Trial Developments: During the course of the district court litigation, Cisco's defense efforts led to significant reductions in the asserted claims. WSOU voluntarily dismissed three of the original five patents before the summary judgment phase. Cisco subsequently secured a win on summary judgment for a fourth patent.

• Pre-February 2025 – Parallel IPR Filings: Concurrently with the district court proceedings, Cisco filed several Inter Partes Review (IPR) petitions with the Patent Trial and Appeal Board (PTAB) challenging the validity of patents asserted by WSOU. Specifically, Cisco filed IPRs against claims from US Patents 8,191,106, 8,665,733, and 9,357,014. These IPRs resulted in the cancellation of all challenged claims for US Patents 8,191,106 and 8,665,733.

• February 2025 – District Court Trial and Verdict: A jury trial commenced in the Western District of Texas focusing on the single remaining asserted patent from the original five. In February 2025, the jury delivered a unanimous verdict in favor of Cisco, finding no infringement of the asserted patent. Furthermore, the jury found the patent invalid and also concluded that the patent could not be asserted against Cisco under 35 U.S.C. § 273 due to Cisco's prior commercial use more than a year before the patent was filed. This comprehensive victory meant WSOU was awarded no damages from the district court case.

• 2024-12-02 – IPR2025-00241 Petition Filed: Cisco Systems, Inc. filed an IPR petition, IPR2025-00241, with the PTAB, challenging U.S. Patent 8,441,721, which is assigned to WSOU Investments LLC.

• Post-2024-12-02 – IPR2025-00241 Outcome (Settlement): IPR2025-00241, concerning U.S. Patent 8,441,721, ultimately concluded with a settlement between Cisco Systems, Inc. and WSOU Investments LLC. The specific terms and date of the settlement for this particular IPR were not immediately available in the public records reviewed. Notably, another IPR between Cisco and WSOU, IPR2025-00188, is listed as "Pending - Instituted."

Due to the settlement of IPR2025-00241, specific counsel of record who made formal appearances in this particular Patent Trial and Appeal Board (PTAB) proceeding are not readily available through public web searches of the docket. However, Cisco Systems, Inc. is known to leverage both its in-house legal team and various outside counsel for its robust patent litigation and inter partes review (IPR) activities.

Based on Cisco's general practices and counsel identified in related PTAB cases and district court litigation, the following individuals and firms are frequently involved in Cisco's patent disputes:

In-House Counsel (Cisco Systems, Inc.)

• John Zhu
  • Role: Director, Associate General Counsel, Intellectual Property Group. [cite: 3 (previous step)]
  • Firm: Cisco Systems, Inc. (San Jose, CA).
  • Note: Manages patent litigation matters, patent strategy, and evaluates third-party IP threats for Cisco's product portfolios. [cite: 3 (previous step)]
• Dan Lang
  • Role: Vice President Legal and Deputy General Counsel.
  • Firm: Cisco Systems, Inc. (San Jose, CA).
  • Note: Involved in IPR disclosures and coordinating litigation strategies between district court and PTAB teams.

Outside Counsel (Likely engaged for PTAB and/or related district court proceedings)

While direct counsel for IPR2025-00241 could not be confirmed, Cisco frequently works with the following firms for patent litigation, including IPRs:

• Gibson, Dunn & Crutcher LLP
  • Notable Attorneys: Brian Rosenthal (Partner), Kate Dominguez (Partner).
  • Office Location: Various, including Dallas, TX.
  • Note: Gibson Dunn has represented Cisco in significant patent trials, securing wins against entities like WSOU Investments LLC in district court.
• Potter Minton Law Firm
  • Notable Attorneys: Mike Jones, Shaun Hassett.
  • Office Location: Tyler, TX.
  • Note: Served as co-counsel with Gibson Dunn in district court cases for Cisco against WSOU Investments.
• Folio Law Group PLLC
  • Notable Attorneys: Joseph M. Abraham, Timothy Franklin Dewberry.
  • Office Location: Austin, TX.
  • Note: Identified as representing Cisco in other IPR proceedings against WSOU Investments (e.g., IPR2025-00188).
• Duane Morris LLP
  • Notable Attorneys: D. Joseph English, Patrick McPherson, Patrick Muldoon, Joseph A. Powers.
  • Office Location: Various.
  • Note: Represented Cisco Systems Inc. in other IPRs (e.g., IPR2024-00497).

Cisco's in-house IP litigation team is responsible for managing all aspects of the company's global patent disputes, including selecting, retaining, and managing outside counsel, and coordinating strategies between U.S. district court litigation and IPR teams.

I am unable to definitively identify the counsel of record representing WSOU Investments LLC in IPR2025-00241. Publicly available information, such as summaries from Unified Patents Portal, confirms the existence and settlement of the IPR but does not consistently list the specific attorneys who appeared for the patent owner in this particular proceeding.

While WSOU Investments LLC (doing business as Brazos Licensing & Development) has been represented by various firms and attorneys in other related district court litigation and Federal Circuit appeals, including Cherry Johnson Siegmund James, PLLC, Folio Law Group PLLC, and Burdick Patents, PA, and Sheyanna Pietras is noted as their in-house General Counsel in other proceedings, there is no direct evidence from the available search results specifying who served as counsel of record for WSOU in IPR2025-00241. To obtain this information, direct access to the official PTAB docket for IPR2025-00241 would be required, which is beyond the scope of this web search.