Siemens Gamesa v. ITC: Federal Circuit Appeal Voluntarily Dismissed
Siemens Gamesa Renewable Energy A/S and Gamesa Electric SAU brought two wind turbine patents — US7629705B2 and US6921985B2 — before the Federal Circuit in a challenge to an ITC determination. The appeal ran 331 days before both sides agreed to dismiss, with each party bearing its own costs.
Wind turbine IP dispute exits Federal Circuit by agreement
Siemens Gamesa Renewable Energy A/S and co-plaintiff Gamesa Electric SAU filed this appeal at the Court of Appeals for the Federal Circuit on 16 May 2022, docketed as Case No. 22-1794. The appeal arose from an infringement action and challenged a determination of the International Trade Commission concerning two patents: US7629705B2, directed to low voltage ride-through technology for wind turbine generators, and US6921985B2, covering methods and apparatus for operating electrical machines.
The recorded basis of termination is Voluntary dismissal. The docket order states that the parties having so agreed, the proceeding is dismissed under Fed. R. App. P. 42(b), with each side bearing its own costs. The specific terms underlying the parties' agreement are not disclosed in the available record.
The appeal closed on 12 April 2023 after 331 days — before the Federal Circuit issued any merits ruling. No fee-shifting was imposed. What drove the parties to agree on dismissal at this stage, and whether any commercial arrangements accompanied the agreement, is not reflected in the public record.
See Complete Case & Patent Analysis →Filing to Voluntary dismissal in 331 days
331-day Federal Circuit appeal — typical FC appeals run 12–24 months
US7629705B2 & US6921985B2 — Wind Turbine Generator Technology
Any company manufacturing, importing, or supplying wind turbine generators with LVRT functionality, or electrical machine control systems, into the US market should treat these patents as live FTO considerations. The absence of a Federal Circuit merits ruling means no appellate claim construction is available to bound the scope of these patents. The ITC determination — which predates this appeal — may contain relevant findings, but its precise scope and current enforceability should be independently verified.
Official order — verbatim text
The dismissal order is a procedural exit under Fed. R. App. P. 42(b), entered on the parties' agreement. It carries no precedential weight and does not affirm, reverse, or vacate the underlying ITC determination. The cost order — each side bearing its own — is neutral and does not signal any judicial assessment of the merits of either party's position.
Voluntarily dismissed: what the agreed exit means for both parties
Fed. R. App. P. 42(b): dismissal by stipulation
Rule 42(b) allows parties to a Federal Circuit appeal to dismiss the proceeding by filing a signed agreement. The court enters the dismissal as an order without adjudicating the merits. Because no merits ruling is issued, the ITC determination being challenged is not affirmed or reversed by this order — it simply remains in whatever state it was when the appeal was filed.
No merits adjudicationWith or without prejudice? The public record is silent
The recorded basis of termination is 'Voluntary dismissal' without specifying whether the dismissal is with or without prejudice. The docket order does not expressly state either characterisation. The distinction matters: a with-prejudice dismissal bars re-filing; a without-prejudice dismissal does not. Because the public record does not resolve this, practitioners should not assume either position without reviewing the full docket.
Prejudice status unconfirmedAppellate challenge withdrawn before any Federal Circuit ruling
Because the Federal Circuit dismissed the appeal before ruling on the merits, the ITC's underlying determination was never reversed or affirmed by this court. The practical effect for the ITC — and for any parties bound by the original determination — depends on the status of that ITC order, which predates this appeal. The dismissal itself does not alter that determination on the record.
ITC order untouched by FCWind turbine IP enforcement: unresolved Federal Circuit precedent
No Federal Circuit precedent was established on low voltage ride-through or electrical machine operation patent claims in this proceeding. Competitors and licensees in the wind energy sector cannot rely on this case for guidance on the validity or scope of US7629705B2 or US6921985B2. Parties with exposure to these patents should conduct independent FTO analysis based on the patents' claim language and prosecution history.
No precedential FC rulingFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Siemens Gamesa Renewable Energy, A/S | Individual | /Search in Eureka ↗ |
| Co-Plaintiff | Gamesa Electric, SAU | Individual | Search in Eureka ↗ |
| Defendant | International Trade Commission | Company | /Search in Eureka ↗ |
| Plaintiff counsel | Elizabeth Sneitzer | Attorney | Counsel for Siemens Gamesa Renewable Energy, A/SSearch in Eureka ↗ |
| Plaintiff counsel | Jason F. Hoffman | Attorney | Counsel for Siemens Gamesa Renewable Energy, A/SSearch in Eureka ↗ |
| Plaintiff counsel | Robert Louis Hails | Attorney | Counsel for Siemens Gamesa Renewable Energy, A/SSearch in Eureka ↗ |
| Plaintiff counsel | T. Cy Walker | Attorney | Counsel for Siemens Gamesa Renewable Energy, A/SSearch in Eureka ↗ |
| Plaintiff law firm | Baker & Hostetler, LLP | Law Firm | Representing Siemens Gamesa Renewable Energy, A/SSearch in Eureka ↗ |
| Defendant counsel | Dominic L. Bianchi General Counsel | Attorney | Counsel for International Trade CommissionSearch in Eureka ↗ |
| Defendant counsel | Robert John Needham | Attorney | Counsel for International Trade CommissionSearch in Eureka ↗ |
| Defendant counsel | Wayne W. Herrington | Attorney | Counsel for International Trade CommissionSearch in Eureka ↗ |
| Defendant law firm | International Trade Commission | Law Firm | Representing International Trade CommissionSearch in Eureka ↗ |
| Defendant law firm | United States International Trade Commission | Law Firm | Representing International Trade CommissionSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Appeals for the Federal CircuitSearch in Eureka ↗ |
R&D signals in wind turbine power electronics IP
Forward-looking patent intelligence derived from Siemens Gamesa's ITC enforcement of US7629705B2 and US6921985B2 — tracking portfolio activity, technology trends, and white-space opportunities in wind turbine generator IP.
Siemens Gamesa's wind generator patent filing activity
Siemens Gamesa has built a substantial portfolio in wind turbine power conversion and grid integration technology. The assertion of both LVRT and electrical machine operation patents at the ITC level suggests active monetisation and enforcement posture. Tracking continuation filings and new applications from Siemens Gamesa in the power electronics and grid-compliance space can signal emerging enforcement vectors.
Active enforcement portfolioLVRT patent filing trends in wind energy
Low voltage ride-through is now a standard grid-code requirement globally, driving continued R&D and patent filings from OEMs, power electronics suppliers, and converter manufacturers. Mapping the LVRT patent landscape reveals which companies are building defensive or offensive positions around grid-compliance technology — a crowded space with high commercial stakes for wind turbine importers and component suppliers.
Grid-compliance IP hotspotITC respondents' patent posture in wind power electronics
The ITC Section 337 investigation underlying this appeal targeted imported wind turbine components. Identifying the likely respondents and their own patent portfolios in electrical machine control and power conversion reveals the competitive IP landscape — and whether cross-licensing or design-around strategies are available to parties facing similar ITC exposure.
ITC respondent IP mappingAdjacent innovation space near US7629705B2 claims
The claim scope of US7629705B2 centres on generator-side LVRT response during voltage transients. Adjacent white space exists in converter-side LVRT, offshore grid integration, and hybrid storage-assisted ride-through architectures — areas where patent density may be lower and where next-generation wind turbine designs are converging. These represent potential R&D and filing opportunities for competitive differentiation.
LVRT white-space filing zoneSimilar Federal Circuit ITC appeals in wind and power electronics IP
Explore related Federal Circuit appeals arising from ITC Section 337 investigations in wind turbine, power electronics, and renewable energy technology — the same court and technology domain as Case No. 22-1794.
What this case signals for wind energy and ITC patent enforcement
A voluntarily dismissed Federal Circuit appeal leaves the underlying ITC determination intact and creates no binding precedent on the patents at issue.
No Federal Circuit ruling means no precedent on LVRT patent claims
Because the appeal was dismissed before merits briefing concluded, the Federal Circuit issued no opinion on US7629705B2 or US6921985B2. Companies operating in the wind turbine sector cannot use this case to assess claim scope or validity — independent analysis remains essential.
ITC Section 337 actions remain a live enforcement tool for wind IP
The fact that Siemens Gamesa pursued ITC relief — and then appealed to the Federal Circuit — signals that ITC Section 337 investigations are an active enforcement vector in the renewable energy equipment space. In-house teams and importers of wind turbine components should monitor ITC dockets alongside district court filings.
A/S v International — key questions answered
The appeal was voluntarily dismissed under Fed. R. App. P. 42(b) on 12 April 2023, with each side bearing its own costs. Siemens Gamesa Renewable Energy and Gamesa Electric had appealed an ITC determination involving patents US7629705B2 and US6921985B2. No merits ruling was issued by the Federal Circuit.
Two patents were asserted: US7629705B2 (application no. US11/551430), covering low voltage ride-through technology for wind turbine generators, and US6921985B2 (application no. US10/350452), covering methods and apparatus for operating electrical machines.
A Rule 42(b) dismissal is a procedural exit by agreement — the Federal Circuit issues no opinion and does not affirm, reverse, or vacate the underlying ITC determination. The ITC's original determination therefore remains in its prior state; the dismissal does not alter it. No precedent is established on the patents' validity or claim scope.
The recorded basis of termination is 'Voluntary dismissal' without specifying with or without prejudice. The docket order does not expressly state either characterisation. The specific terms are not disclosed in the available public record.
Because the Federal Circuit dismissed the appeal without ruling on the merits, no appellate claim construction or validity analysis was issued for US7629705B2. The patent's enforceability and claim scope remain governed by the prosecution history and the ITC's prior findings. Companies importing or manufacturing wind turbine LVRT systems should conduct independent FTO analysis rather than relying on this case for guidance.
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