Patent No. EP3303891 (titled "Method For Diagnosing A Diaphragm Valve, And Diagnosis System For A Diaphragm Valve") was filed by GEM Gebr Mller Apparatebau Kommanditgesellschaft on May 17, 2016. The application was issued on Apr 24, 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 |
|---|---|---|
| SISTO ARMATUREN | Jan 24, 2020 | BEHR |
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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