Patent No. EP2511939 (titled "Arrangement And Method For The Contrast Improvement In A Charged Particle Beam Device For Inspecting A Specimen") was filed by ICT Integrated Circuit Testing Gesellschaft FR Halbleiterprftechnik on Apr 13, 2011. The application was issued on Mar 23, 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 |
|---|---|---|
| CARL ZEISS MICROSCOPY GMBH | Dec 23, 2016 | CARL ZEISS PATENTABTEILUNG |
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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