Patent No. EP2859231 (titled "Arragnement Of A Switchgear In A Tower Of A Wind Turbine") was filed by Vestas Wind Systems on Jun 7, 2013. The application was issued on Aug 9, 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 WIND POWER | May 8, 2018 | ASPACHER |
| GE WIND ENERGY | May 8, 2018 | ZIMMERMANN & PARTNER PATENTANWALTE MBB |
| SIEMENS GAMESA RENEWABLE ENERGY | May 8, 2018 | ASPACHER |
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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