Patent No. EP1959080 (titled "Fitting For A Sliding Leaf Of A Door Or Window") was filed by Hautau on Feb 14, 2008. The application was issued on Dec 27, 2017.

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 |
|---|---|---|
| GRETSCH UNITAS BAUBESCHLAGE | Sep 26, 2018 | DREISS PATENTANWALTE PARTG MBB |
| SIEGENIA AUBI | Sep 26, 2018 | FREUDENBERG |
| ROTO FRANK | Mar 20, 2018 | 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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