Patent No. EP2811120 (titled "Geared Architecture For High Speed And Small Volume Fan Drive Turbine") was filed by Raytheon on Feb 17, 2014. The application was issued on Jul 12, 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.
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.