Patent No. EP1228863 (titled "Protection Film") was filed by Drken on Jul 12, 2001. The application was issued on Nov 4, 2015.

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 |
|---|---|---|
| HELD | Jul 29, 2016 | HELD |
| DON & LOW LIMITED | Jul 27, 2016 | MORELAND |
| BMI STEILDACH GMBH | Jul 22, 2016 | GRUNDMANN |
| RKW | Feb 11, 2016 | BUSCH |
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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