Patent No. EP1882534 (titled "Die Cushion Device For Press Machine") was filed by Aida Engineering on Jan 17, 2006. The application was issued on Sep 24, 2014.

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 |
|---|---|---|
| BOSCH REXROTH | Jun 24, 2015 | WINTER |
| MOOG | Jun 23, 2015 | WITTMANN |
| SCHULER PRESSEN GMBH | Jun 16, 2015 | RUGER ABEL PATENTANWALTE PARTGMBB |
| VOITH PATENT | Oct 16, 2014 | DR WEITZEL & PARTNER |
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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