On-Load Tap Changer And Method For Operating An On-Load Tap Changer
Patent No. EP4404228 (titled "On-Load Tap Changer And Method For Operating An On-Load Tap Changer") was filed by Hitachi Energy on Jan 23, 2023. The application was issued on Aug 27, 2025.
Patent Summary
Patent Family
Patent Oppositions (2)
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.
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.
Date
Description
Get instant alerts for new documents
EP4404228
- Application Number
- EP23152906A
- Filing Date
- Jan 23, 2023
- Status
- Granted And Under Opposition
- Jul 25, 2025
- Publication Date
- Aug 27, 2025
- External Links
- Slate, Register , Google Patents