Patent No. EP3144390 (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 18, 2020.

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 |
|---|---|---|
| GRUND | Dec 18, 2020 | GRUND |
| PATENT BOUTIQUE | Mar 30, 2020 | PATENT BOUTIQUE |
| CRISPR THERAPEUTICS | Mar 19, 2020 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB |
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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