Patent No. EP2940140 (titled "Engineering Of Systems, Methods And Optimized Guide Compositions For Sequence Manipulation") was filed by Massachusetts Institute OF Technology on Dec 12, 2013. The application was issued on Mar 27, 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 |
|---|---|---|
| SCHLICH | Dec 24, 2019 | - |
| PATENT BOUTIQUE | Dec 16, 2019 | PATENT BOUTIQUE |
| CRISPR THERAPEUTICS | Nov 5, 2019 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB |
| GRUND | Jul 31, 2019 | - |
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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