Patent No. EP2556285 (titled "Door Lock") was filed by Wobben Properties on Nov 2, 2011. The application was issued on Apr 27, 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 |
|---|---|---|
| VESTAS WIND SYSTEMS | Jan 27, 2017 | SAMSON & PARTNER PATENTANWALTE MBB |
| SIEMENS GAMESA RENEWABLE ENERGY | Jan 25, 2017 | ASPACHER |
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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