Patent No. EP3087771 (titled "Systems, Devices, And Methods For Authentication In An Analyte Monitoring Environment") was filed by Abbott on Dec 17, 2014. The application was issued on Jun 17, 2020.

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 |
|---|---|---|
| DEXCOM DEUTSCHLAND | Nov 9, 2021 | HOFFMANN EITLE |
| DEXCOM | Mar 16, 2021 | HOFFMANN EITLE |
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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