Patent No. EP3888929 (titled "A Method Of Manufacturing A Discretized Optical Security Microstructure On A Substrate And A Shim For Use In The Method") was filed by NWM Research Spolka Z Ograniczona Odpowiedzialnoscia Spolka Komandytowa on Mar 31, 2020. The application was issued on May 11, 2022.

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 |
|---|---|---|
| LEONHARD KURZ STIFTUNG | Feb 10, 2023 | LOUIS POHLAU LOHRENTZ |
| RENTSCH PARTNER | Feb 10, 2023 | - |
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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