Patent No. EP3064689 (titled "Hold-Open Device For A Door") was filed by Dorma Deutschland on Dec 30, 2015. The application was issued on Feb 19, 2025.

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 SICHERHEITSTECHNIK | Jan 24, 2020 | LOUIS POHLAU LOHRENTZ |
| GEZE | Jan 23, 2020 | 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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