Patent No. EP2579928 (titled "Drive Assembly, Drive Component And Drug Delivery Device") was filed by Sanofi Aventis Deutschland on Jun 9, 2011. The application was issued on Oct 11, 2017.

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 |
|---|---|---|
| PATENTREE | Jul 11, 2018 | INSPICOS PS |
| BANDPAY & GREUTER | Jul 9, 2018 | BANDPAY & GREUTER |
| YPSOMED | Mar 20, 2018 | SSM SANDMAIR |
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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