Patent No. EP2857049 (titled "Medical Device For Dosing Drugs") was filed by Bayer on Aug 26, 2003. The application was issued on Nov 30, 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 |
|---|---|---|
| COOK MEDICAL | Aug 29, 2017 | WILLIAMS POWELL |
| C. R. BARD, INC. | Aug 23, 2017 | HOFFMANN EITLE |
| BOSTON SCIENTIFIC | Aug 21, 2017 | PETERREINS SCHLEY |
| AHRENS | Jul 26, 2017 | AHRENS |
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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