Patent No. EP2287073 (titled "Vertical Wind Tunnel Frefall Simulator") was filed by Skyventure on Aug 1, 2005. The application was issued on May 26, 2021.

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 |
|---|---|---|
| STROJIRNA LITVINOV | Apr 15, 2015 | CABINET PLASSERAUD |
| JOCHEN SCHWEIZER PROJECTS | Apr 9, 2015 | PRINZ & PARTNER |
| DOHR | Mar 23, 2015 | MEISSNER BOLTE PARTNERSCHAFT MBB |
| INDOOR SKYDIVING BOTTROP | Dec 23, 2014 | ZECH |
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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