Patent No. EP1523226 (titled "Heating Assembly With Ptc Elements, Particularly For Motor Vehicles") was filed by Behr France on Oct 7, 2003. The application was issued on Dec 10, 2014.

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 |
|---|---|---|
| VALEO SYSTEMES THERMIQUES | Sep 10, 2015 | VALEO SYSTEMES THERMIQUES |
| EBERSPACHER CATEM | Sep 3, 2015 | GRUNECKER PATENT |
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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