Patent No. EP1449385 (titled "Macroblock Level Adaptive Frame/Field Coding For Digital Video Content") was filed by General Instrument on Nov 21, 2002. The application was issued on Jul 22, 2015.

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 |
|---|---|---|
| INTERESSENGEMEINSCHAFT FUR RUNDFUNKSCHUTZRECHTE EV IGR | Apr 12, 2016 | PROLL |
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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