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Notification Device And Door Opening-Closing Device - EP3656642
The patent EP3656642 was granted to Nabtesco on Aug 16, 2023. The application was originally filed on Oct 22, 2019 under application number EP19204557A. The patent is currently recorded with a legal status of "Granted And Under Opposition".
EP3656642
- Application Number
- EP19204557A
- Filing Date
- Oct 22, 2019
- Status
- Granted And Under Opposition
- Jul 14, 2023
- Publication Date
- Aug 16, 2023
- External Links
- Slate, Register, Google Patents
Patent Summary
Notification device for railway doors that detects stuck door switches and prevents false closure notifications. The device includes a door switch that normally transitions between open and closed states, and an interruption unit that detects abnormal switch behavior and overrides the switch's normal operation to prevent false closure signals.
Patent Family
Patent Oppositions
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.
Patent Citations (8) New
Patent citations refer to prior patents cited during different phases such as opposition or international search.
Dossier Documents
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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