Patent No. EP2797239 (titled "A Method And A Telecommunication Device For Selecting A Number Of Code Channels And An Associated Spreading Factor For A Cdma Transmission") was filed by Nokia Solutions And Networks on Oct 28, 2005. The application was issued on Sep 5, 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 |
|---|---|---|
| BURY | Jun 5, 2019 | GERSTEIN |
| CONTINENTAL AUTOMOTIVE | Jun 5, 2019 | BRAUN DULLAEUS PANNEN EMMERLING PATENT & RECHTSANWALTSPARTNERSCHAFT MBB |
| ROBERT BOSCH | Jun 5, 2019 | HESELBERGER |
| TOMTOM SALES | Jun 5, 2019 | GRODL |
| DAIMLER | Jun 5, 2019 | GROSCH |
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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