Patent No. EP2215861 (titled "System And Method For Providing Low Overhead Floor Control In A Distributed Peer-To-Peer Communications Network") was filed by Motorola on Nov 12, 2008. The application was issued on Jul 4, 2018.

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 |
|---|---|---|
| HYTERA COMMUNICATIONS | Apr 4, 2019 | 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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