Patent No. EP2673502 (titled "Method For Operating A Wind Power Installation And Wind Power Installation") was filed by Repower Systems on Feb 6, 2012. The application was issued on Apr 20, 2016.

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 |
|---|---|---|
| ENERCON | Jan 20, 2017 | EISENFUHR SPEISER |
| SIEMENS GAMESA RENEWABLE ENERGY | Jan 18, 2017 | ASPACHER |
| VESTAS WIND SYSTEMS | Jan 17, 2017 | VESTAS PATENTS DEPARTMENT |
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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