Patent No. EP1132562 (titled "Corner Reinforcements Or Struts For Sliding Wings") was filed by Hautau on Mar 6, 2001. The application was issued on Sep 4, 2019.

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 |
|---|---|---|
| ROTO FRANK AG | Mar 21, 2017 | KOHLER SCHMID MOBUS PATENTANWALTE |
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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