Patent No. EP2586952 (titled "Gate With Provisions For Insulation") was filed by Hrmann Brockhagen on May 20, 2009. 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 |
|---|---|---|
| ASSA ABLOY ENTRANCE SYSTEMS | Sep 24, 2015 | DR UDO TAPPE |
| NOVOFERM GMBH | Sep 24, 2015 | LORENZ |
| KRISPOL SP ZOO | Sep 22, 2015 | - |
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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