Patent No. EP3405962 (titled "Device For The Generation, Transmission, Distribution And/Or Use Of Electrical Energy Or Component Of Such A Device And Gas Seal For Such A Device Or Component") was filed by ABB Power Grids Switzerland on Jan 20, 2017. The application was issued on Mar 4, 2020.

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 |
|---|---|---|
| CARL FREUDENBERG | Nov 17, 2020 | ZELLENTIN & PARTNER |
| CARL FREUDENBERG | Nov 17, 2020 | ZELLENTIN & PARTNER MBB PATENTANWALTE |
| SIEMENS ENERGY | Nov 11, 2020 | - |
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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