Patent No. EP2827520 (titled "Adaptive Transport Format Uplink Signaling For Data-Non-Associated Feedback Control Signals") was filed by Beijing Xiaomi Mobile Software on Jun 19, 2008. The application was issued on Aug 17, 2022.

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 |
|---|---|---|
| HUAWEI DUESSELDORF | Jun 26, 2019 | KORBER |
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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