Patent No. EP3638556 (titled "Method And Apparatus For Controlling A Compressed Air Supply") was filed by Knorr Bremse Systeme FR Schienenfahrzeuge on Jun 4, 2018. The application was issued on Jan 1, 2025.

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 |
|---|---|---|
| ATLAS COPCO | Dec 17, 2021 | VAN MINNEBRUGGEN |
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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