Patent No. EP1590567 (titled "Wind Turbine Generator With A Low Voltage Ride Through Controller And A Method For Controlling Wind Turbine Components") was filed by General Electric on Jan 23, 2004. The application was issued on Oct 4, 2017.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| SIEMENS GAMESA RENEWABLE ENERGY | Mar 29, 2021 | S SCHRAMM SCHNEIDER BERTAGNOLL PATENT UND RECHTSANWALTE PART MBB |
| NORDEX ENERGY | Jul 4, 2018 | HAUCK |
| NORDEX ENERGY | Jul 4, 2018 | HAUCK PATENTANWALTSPARTNERSCHAFT MBB |
| SIEMENS GAMESA RENEWABLE ENERGY | Jul 4, 2018 | SGRE ASSOCIATION |
| SIEMENS GAMESA RENEWABLE ENERGY DEUTSCHLAND | Jul 4, 2018 | SGRE ASSOCIATION |
| VESTAS WIND SYSTEMS | Jul 4, 2018 | SAMSON & PARTNER PATENTANWALTE MBB |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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