Patent No. EP2280636 (titled "Close Proximity Communication Device And Methods") was filed by Abbott Diabetes Care Inc. on May 28, 2009. 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 |
|---|---|---|
| DEXCOM | Oct 11, 2021 | HOFFMANN EITLE |
| ROCHE DIABETES CARE GMBH | Aug 29, 2017 | GRUNECKER PATENT |
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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