Patent No. EP3182709 (titled "Carriage Of Sei Message In Rtp Payload Format") was filed by Nokia on Jan 17, 2008. The application was issued on May 12, 2021.

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 |
|---|---|---|
| S SCHRAMM SCHNEIDER BERTAGNOLL PATENT UND RECHTSANWALTE PART MBB | Feb 11, 2022 | BRAUN DULLAEUS PANNEN EMMERLING PATENT & RECHTSANWALTSPARTNERSCHAFT MBB |
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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