Patent No. EP2261369 (titled "Gene Expression Profiling In Biopsied Tumor Tissues") was filed by Genomic Health on Mar 12, 2003. The application was issued on May 14, 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 |
|---|---|---|
| MINTZ LEVIN COHN FERRIS GLOVSKY AND POPEO | Feb 12, 2015 | COOLEY UK |
| SIVIDON DIAGNOSTICS | May 14, 2014 | DOMPATENT VON KREISLER SELTING WERNER |
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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