Patent No. EP3921574 (titled "A Lighting Device") was filed by Signify Holding on Feb 4, 2020. The application was issued on Oct 5, 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 |
|---|---|---|
| COELUX | Jul 5, 2023 | GRATTINGER MOHRING VON POSCHINGER PATENTANWALTE PARTNERSCHAFT 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.
Date
Description
Get instant alerts for new documents
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Feb 17, 2026
Dec 4, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Aug 5, 2025
Aug 1, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
May 30, 2025
May 30, 2025
May 23, 2025
May 23, 2025
May 23, 2025
May 23, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 6, 2025
Feb 26, 2025
Feb 25, 2025
Feb 25, 2025
Feb 25, 2025
Jan 9, 2025
Jan 9, 2025
Jan 3, 2025
Jan 3, 2025
Jan 3, 2025
Jan 3, 2025
Jan 3, 2025
Jan 3, 2025
Jan 3, 2025
Jan 3, 2025
Jan 3, 2025
Jul 24, 2024
Jul 24, 2024
Jul 24, 2024
Jul 24, 2024
Jul 24, 2024
Jan 8, 2024
Nov 30, 2023
Nov 30, 2023
Nov 30, 2023
Nov 30, 2023
Nov 30, 2023
Nov 30, 2023
Nov 30, 2023
Nov 30, 2023
Aug 4, 2023
Aug 4, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 18, 2023
Jul 17, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Jul 5, 2023
Oct 17, 2022
Sep 8, 2022
Aug 30, 2022
Aug 30, 2022
Aug 30, 2022
Aug 30, 2022
May 2, 2022
May 2, 2022
May 2, 2022
May 2, 2022
May 2, 2022
Mar 31, 2022
Nov 17, 2021
Sep 10, 2021
Aug 23, 2021
Aug 4, 2021
Aug 4, 2021
Aug 4, 2021
Aug 4, 2021
Aug 4, 2021
Aug 4, 2021
Aug 4, 2021
Jun 18, 2021
Aug 31, 2020
Aug 13, 2020
Aug 13, 2020
Feb 10, 2020
Feb 4, 2020
Feb 4, 2020
Feb 4, 2020
Feb 4, 2020
Feb 4, 2020
Feb 4, 2020
Feb 4, 2020
Feb 4, 2020