Patent No. EP3844039 (titled "Method, Control Unit And Control System For Controlling A Parking Brake System For A Vehicle Combination Having A Towing Vehicle And A Trailer") was filed by Knorr Bremse Systeme FR Nutzfahrzeuge on Jul 25, 2019. The application was issued on Nov 30, 2022.

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 |
|---|---|---|
| ZF CV SYSTEMS EUROPE | Aug 30, 2023 | BREMER |
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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