WSOU Investments v. TP-Link — Router Patent Case Dismissed With Prejudice
WSOU Investments LLC, a patent assertion entity, sued TP-Link Technologies over US7751423B2 — a wireless networking patent — targeting the AC5400 Gaming Router. After more than three years in the Western District of Texas before Judge Alan Albright, the parties jointly moved to dismiss all claims with prejudice, each side bearing its own costs.
Three-year W.D. Texas router patent case ends in joint dismissal
On October 31, 2020, WSOU Investments LLC filed suit against TP-Link Technologies Co., Ltd. in the Western District of Texas (Case No. 6:20-cv-01014), asserting infringement of US7751423B2. The accused product was TP-Link’s AC5400 Gaming Router, a high-performance consumer wireless router. The case was assigned to Chief Judge Alan D. Albright, whose Waco division had become a prominent venue for patent assertion entities during this period.
The case concluded on January 3, 2024, when Judge Albright granted the parties’ Joint Motion to Dismiss with Prejudice. Under the dismissal order, all claims asserted by WSOU against TP-Link were extinguished permanently, with each side bearing its own costs, expenses, and attorneys’ fees. A dismissal with prejudice is a final adjudication on the merits, meaning WSOU is permanently barred from reasserting the same patent claims against TP-Link on the same grounds.
The case ran for approximately 1,160 days — over three years — before reaching resolution through a joint motion, which typically signals a negotiated settlement or license agreement reached privately between the parties. The public record is silent on any financial terms, as joint dismissals of this type require no disclosure of consideration exchanged. What drove the timing after three years of litigation remains undisclosed, though the mutual cost-bearing structure suggests neither party secured a clear litigation victory before resolving.
Filing to filing in 1159 days
Days from filing (Oct 2020) to dismissal (Jan 2024)
Full party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | WSOU Investments, LLC | Company | Patent assertion entity — holder of US7751423B2, wireless networking technologySearch in Eureka ↗ |
| Defendant | TP-Link Technologies Co., Ltd. | Company | TP-Link Technologies Co., Ltd. — global manufacturer of consumer networking equipmentSearch in Eureka ↗ |
| Plaintiff counsel | Raymond W. Mort , III | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Defendant counsel | David M. Hoffman | Attorney | Counsel for TP-Link Technologies Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Edward J. Mayle | Attorney | Counsel for TP-Link Technologies Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Jeffrey C. Mok | Attorney | Counsel for TP-Link Technologies Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | John T. Johnson | Attorney | Counsel for TP-Link Technologies Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Kristopher L. Reed | Attorney | Counsel for TP-Link Technologies Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Michael F. Autuoro | Attorney | Counsel for TP-Link Technologies Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Rishi Gupta | Attorney | Counsel for TP-Link Technologies Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Sarah Y. Kamran | Attorney | Counsel for TP-Link Technologies Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Steven D. Moore | Attorney | Counsel for TP-Link Technologies Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Wesley Ellsworth Overson, Jr | Attorney | Counsel for TP-Link Technologies Co., Ltd.Search in Eureka ↗ |
| Presiding judge | Judge Alan D Albright | Chief Judge | Texas Western District Court — Chief JudgeSearch in Eureka ↗ |
Stipulation of dismissal — official text
The order grants a joint motion, confirming this was a bilateral, consensual exit from litigation — not a court-imposed outcome. The with-prejudice language provides TP-Link with permanent protection against reassertion of these specific claims by WSOU. The mutual cost-bearing provision is deliberately neutral, avoiding any prevailing-party designation that could trigger a fee-shifting motion under 35 U.S.C. § 285. The order’s brevity and structure are consistent with a private settlement executed contemporaneously.
US7751423B2 — Wireless Networking Data Transmission Patent
US7751423B2 (application no. US11/221786) is a United States utility patent covering wireless networking technology. As asserted against TP-Link’s AC5400 Gaming Router — a tri-band, MU-MIMO consumer router — the patent implicates techniques relevant to data transmission and routing in wireless environments. The application number prefix suggests a mid-2000s filing, consistent with WSOU’s broader portfolio of Nokia and Alcatel-Lucent legacy patents developed during foundational periods of Wi-Fi and broadband router innovation.
WSOU’s decision to assert this patent against the AC5400 — one of TP-Link’s premium gaming router lines — suggests the asserted claims are broad enough to reach high-performance consumer wireless products. For networking OEMs developing routers, access points, or wireless infrastructure, the patent represents a meaningful assertion risk within WSOU’s active enforcement campaign. The with-prejudice dismissal resolves TP-Link’s exposure but leaves all other market participants fully exposed to the same claims.
Should you run an FTO analysis against US7751423B2?
Any company designing, manufacturing, or distributing consumer wireless routers, enterprise access points, or related networking equipment should consider a freedom-to-operate review against US7751423B2. WSOU has demonstrated a willingness to litigate this patent through three years of proceedings in a favourable venue. The fact that TP-Link — a major global networking OEM — engaged a large defence team from Fish & Richardson and Kilpatrick Townsend signals that the claims were taken seriously.
PatSnap Eureka’s FTO Search Agent can map the claim scope of US7751423B2 against your specific product architecture, flag design-around opportunities, and surface relevant prior art that may inform invalidity positions. Continuous claim monitoring through Eureka also alerts your team if WSOU — or a subsequent assignee — files continuation claims that could extend the patent family’s reach into next-generation Wi-Fi 6 and Wi-Fi 7 product lines.
Run a freedom-to-operate analysis on US7751423B2 to assess your product’s exposure
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What this case signals for the wireless networking IP landscape
WSOU’s campaign against networking OEMs reached TP-Link — here is what competitors and licensees should take from the outcome.
US7751423B2 remains in force — non-parties have no coverage from this dismissal
The with-prejudice dismissal protects only TP-Link from future assertions under this patent by WSOU. The patent itself remains active and assertable against other wireless router manufacturers and networking equipment vendors. Any company whose products implement similar wireless networking techniques should evaluate their exposure independently.
WSOU’s serial litigation model targets the entire networking OEM sector
WSOU Investments is a prolific patent assertion entity with a portfolio derived largely from Nokia and Alcatel-Lucent assets. This case is one of many filed across multiple technology verticals. Networking OEMs — particularly those selling consumer routers, access points, and wireless infrastructure — should treat WSOU’s portfolio as an ongoing enforcement risk, not a resolved threat.
WSOU v TP-Link — key questions answered
The case was dismissed with prejudice on January 3, 2024, pursuant to a joint motion filed by both parties. All claims asserted by WSOU against TP-Link were permanently extinguished, with each side bearing its own costs, expenses, and attorneys’ fees. The dismissal followed over three years of litigation in the Western District of Texas.
WSOU asserted US7751423B2 (application no. US11/221786), a wireless networking patent. The accused product was TP-Link’s AC5400 Gaming Router, a high-performance tri-band consumer router. The patent is part of WSOU’s broader portfolio of legacy telecommunications patents, reportedly derived from Nokia and Alcatel-Lucent assets.
A dismissal with prejudice operates as a final judgment on the merits. It permanently bars WSOU Investments from refiling the same patent infringement claims — based on US7751423B2 — against TP-Link in any future proceeding. It is the most complete form of closure for a defendant, short of a full trial verdict. Other companies are unaffected by this specific bar.
The public record does not confirm a settlement. The case was resolved by a joint motion to dismiss — a mechanism consistent with a private negotiated resolution — but no financial terms or license agreement were publicly disclosed. The mutual cost-bearing provision and three-year duration suggest a negotiated exit rather than a decisive litigation win for either party.
Yes. The with-prejudice dismissal protects only TP-Link from future assertions under this patent by WSOU. The patent remains in force and is assertable against other companies in the networking equipment space. Manufacturers of wireless routers, access points, and related products should conduct independent freedom-to-operate analysis against US7751423B2 if they have not already done so.
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