Patent No. EP3441997 (titled "Safety Switch Device For Safe Activation/Deactivation Of At Least One Electric Machine") was filed by Sick on Aug 11, 2017. The application was issued on Oct 2, 2019.

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 |
|---|---|---|
| PHOENIX CONTACT | Jul 2, 2020 | BLUMBACH ZINNGREBE PATENTANWALTE PARTG 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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