Patent No. EP2543875 (titled "Manufacturing Method Of Wind Turbine Blades Of Different Lengths") was filed by Gamesa Innovation & Technology on Jul 4, 2012. The application was issued on Sep 15, 2021.

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.
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.