Patent No. EP2397914 (titled "Developing Device, Memory Unit Thereof, And Image Forming Apparatus") was filed by Samsung Electronics on Jul 24, 2008. The application was issued on Jun 13, 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 |
|---|---|---|
| BROGNO | Mar 4, 2015 | LERMER, CHRISTOPH |
| HQ PATRONEN | Mar 4, 2015 | CBDL EGBR |
| KREUTZER | Mar 4, 2015 | CBDL EGBR |
| ABACUS | Jul 18, 2014 | ISARPATENT |
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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