Patent No. EP2239979 (titled "Method For Operating A Mobile Radio Station In A Mobile Radio System") was filed by Ipcom on Nov 26, 1999. The application was issued on Sep 7, 2016.

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 |
|---|---|---|
| VODAFONE GMBH | Jun 6, 2017 | JOSTARNDT PATENTANWALTS |
| TELEFONAKTIEBOLAGET L M ERICSSON PUBL | Jun 1, 2017 | HOFFMANN EITLE |
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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