Patent No. EP1819217 (titled "Resistance To Downy Mildew Of Onion Caused By The Fungus Peronospora Destructor") was filed by Hazera Seeds on Nov 25, 2005. The application was issued on Mar 9, 2016.

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 |
|---|---|---|
| BEJO ZADEN | Sep 30, 2016 | VAN KOOIJ |
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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