Patent No. EP1957655 (titled "Disease Resistant Plants") was filed by Enza Zaden Beheer on Nov 1, 2006. The application was issued on Jun 3, 2026.

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 |
|---|---|---|
| NUNHEMS | May 24, 2017 | BASF ASSOCIATION |
| POP VRIEND RESEARCH | May 24, 2017 | BRANTSANDPATENTS BVBA |
| RIJK ZWAAN ZAADTEELT EN ZAADHANDEL | May 22, 2017 | KROHN |
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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