Patent No. EP3698431 (titled "Antenna For A Hearing Assistance Device") was filed by Widex on Sep 20, 2018. The application was issued on Jul 6, 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 |
|---|---|---|
| OTICON | Apr 6, 2023 | COHAUSZ & FLORACK |
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
Sep 24, 2025
Aug 19, 2025
Aug 18, 2025
Aug 11, 2025
Aug 4, 2025
Aug 4, 2025
Aug 4, 2025
May 27, 2025
May 27, 2025
May 27, 2025
Apr 2, 2025
Mar 28, 2025
Mar 28, 2025
Mar 28, 2025
Jan 30, 2025
Jan 30, 2025
Jan 23, 2025
Jan 23, 2025
Jan 23, 2025
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 6, 2024
Sep 9, 2024
Sep 6, 2024
Sep 6, 2024
Sep 6, 2024
Sep 6, 2024
Sep 5, 2024
Sep 5, 2024
Sep 5, 2024
Sep 3, 2024
Sep 2, 2024
Sep 2, 2024
Sep 2, 2024
Feb 5, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Oct 18, 2023
Aug 21, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Apr 21, 2023
Apr 21, 2023
Apr 13, 2023
Apr 6, 2023
Apr 6, 2023
Apr 6, 2023
Apr 6, 2023
Apr 6, 2023
Apr 6, 2023
Apr 6, 2023
Apr 6, 2023
Apr 6, 2023
Apr 6, 2023
Jul 19, 2022
Jun 10, 2022
May 25, 2022
May 25, 2022
May 25, 2022
May 25, 2022
May 25, 2022
May 4, 2022
May 4, 2022
May 4, 2022
May 4, 2022
May 4, 2022
Sep 9, 2021
Sep 9, 2021
Sep 9, 2021
Sep 9, 2021
Sep 9, 2021
Sep 9, 2021
Sep 9, 2021
Sep 9, 2021
Sep 6, 2021
Sep 6, 2021
Sep 6, 2021
May 10, 2021
May 10, 2021
May 3, 2021
Jul 29, 2020
Jun 24, 2020
Jun 17, 2020
Jun 17, 2020
Jun 17, 2020
Jun 9, 2020
May 29, 2020
May 28, 2020
May 27, 2020
May 27, 2020
Mar 11, 2020
Mar 4, 2020
Mar 4, 2020
Mar 4, 2020
Mar 4, 2020
Mar 4, 2020
Mar 4, 2020
Mar 4, 2020
Feb 28, 2020
May 20, 2019
May 20, 2019
May 20, 2019
May 20, 2019
May 20, 2019
Apr 25, 2019
Apr 25, 2019
Jan 4, 2019
Jan 4, 2019
Jan 4, 2019
Nov 5, 2018
Oct 8, 2018
Oct 8, 2018
Sep 20, 2018
Sep 20, 2018
Sep 20, 2018
Sep 20, 2018
Sep 20, 2018
Sep 20, 2018
Sep 20, 2018