Patent No. EP2213034 (titled "Improved Ack/Nack Dtx Detection And Signalling Of Not Receiving A Downlink Allocation Grant Message") was filed by Nokia Siemens Networks on Oct 2, 2008. The application was issued on Aug 27, 2014.

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 |
|---|---|---|
| APPLE RETAIL GERMANY | May 10, 2017 | HOFFMANN EITLE |
| KIVIAL | May 26, 2015 | PETRAZ |
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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