Patent No. EP2121011 (titled "Vaccines Including Antigen From Four Strains Of Influenza Virus") was filed by Novartis on Dec 5, 2007. The application was issued on May 21, 2014.

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 |
|---|---|---|
| GLAXOSMITHKLINE BIOLOGICALS SA | Feb 20, 2015 | GOODALL |
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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