Patent No. EP2821681 (titled "Device And Method For Compressed Air Distribution Using A Stepping Motor Distributor") was filed by Boller on Jun 22, 2014. The application was issued on Mar 15, 2017.

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 |
|---|---|---|
| BONNEL TECHNOLOGIE S.R.O. | Dec 13, 2017 | SCHNEIDER, ANDREAS |
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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