Patent No. EP3258992 (titled "Data Collection Device For Attachment To An Injection Device") was filed by Sanofi Aventis Deutschland on Feb 12, 2016. The application was issued on May 28, 2025.

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 |
|---|---|---|
| HERZOG PATENTANWALTS | Aug 25, 2021 | HERZOG PATENTANWALTS |
| DI CARE ZRT | Aug 23, 2021 | KACSUK |
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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