Patent No. EP4006348 (titled "Fan With An External Rotor Motor And Cooling Channel For Cooling The Motor Electronics And Motor Drive Components") was filed by EBM Papst Mulfingen on Jan 12, 2021. The application was issued on Aug 7, 2024.

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 |
|---|---|---|
| ZIEHL ABEGG | May 7, 2025 | ULLRICH & NAUMANN PARTG MBB |
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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