Patent No. EP1900343 (titled "Stent Valves And Uses Of Same") was filed by Cook Biotech on Jan 31, 2001. The application was issued on Oct 21, 2015.

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 |
|---|---|---|
| ST JUDE MED | Jul 21, 2016 | LKGLOBAL LORENZ & KOPF |
| BOSTON SCIENTIFIC | Jul 5, 2016 | PETERREINS SCHLEY |
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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