Patent No. EP1801415 (titled "Wind Turbine With Regreasing Device For The Generator Bearing") was filed by Repower Systems on Dec 1, 2006. The application was issued on Feb 24, 2021.

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 |
|---|---|---|
| SKF | Mar 11, 2015 | SPL PATENTANWALTE PARTG MBB |
| NORDEX ENERGY | Mar 11, 2015 | HAUCK |
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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