Patent No. EP2650461 (titled "Device For Controlling The Closure Sequence A Self-Closing Double-Leaf Door And A Method For Controlling The Closing Of A Self-Closing Door And Fireproof Door With A Device For Controlling The Closure Sequence") was filed by GU Automatic on Apr 10, 2013. The application was issued on Mar 20, 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 |
|---|---|---|
| GEZE | Dec 20, 2019 | MANITZ FINSTERWALD PATENT UND RECHTSANWALTSPARTNERSCHAFT MBB |
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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