Patent No. EP1886016 (titled "A Pitch Controlled Wind Turbine Blade, A Wind Turbine And Use Hereof") was filed by Vestas Wind Systems on May 17, 2005. The application was issued on May 10, 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 |
|---|---|---|
| LM WIND POWER | Feb 12, 2018 | COPA COPENHAGEN PATENTS |
| NORDEX ENERGY | Feb 9, 2018 | HAUCK |
| NORDEX ENERGY | Feb 9, 2018 | HAUCK PATENTANWALTSPARTNERSCHAFT MBB |
| SIEMENS GAMESA RENEWABLE ENERGY | Feb 8, 2018 | SGRE ASSOCIATION |
| SUZLON ENERGY | Feb 7, 2018 | MAIKOWSKI & NINNEMANN PATENTANWALTE PARTNERSCHAFT 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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