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Patent No. EP2890973 (titled "Spectrophotometric Analysis Of Embryonic Chick Feather Color") was filed by Agri Advanced on Aug 27, 2013. The application was issued on Oct 14, 2020.

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 |
|---|---|---|
| YISSUM RESEARCH OF THE HEBREW UNIVERSITY OF JERUSALEM LTDRAMOT AT TEL AVIV UNIVERSITY | May 25, 2021 | PEARL COHEN ZEDEK LATZER BARATZ UK |
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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