Patent No. EP3817205 (titled "Circuit Arrangement For Evaluating An Input Voltage Of A Power Supply And Associated Method") was filed by Siemens on Oct 29, 2019. The application was issued on Jun 12, 2024.

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 |
|---|---|---|
| KSB | Mar 12, 2025 | VON TIETZEN UND HENNIG |
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
Sep 14, 2026
Sep 14, 2026
Sep 9, 2026
Sep 9, 2026
Sep 9, 2026
Jul 10, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jun 23, 2026
Apr 24, 2026
Apr 24, 2026
Apr 23, 2026
Apr 23, 2026
Apr 23, 2026
Apr 22, 2026
Apr 22, 2026
Apr 22, 2026
Dec 12, 2025
Dec 12, 2025
Dec 12, 2025
Dec 12, 2025
Dec 12, 2025
Oct 30, 2025
Oct 30, 2025
Oct 22, 2025
Oct 22, 2025
Oct 2, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Jul 29, 2025
Jul 29, 2025
Jul 21, 2025
Jul 21, 2025
Jul 21, 2025
Mar 26, 2025
Mar 26, 2025
Mar 17, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Jun 25, 2024
May 16, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
Feb 13, 2024
Feb 13, 2024
Feb 13, 2024
Feb 13, 2024
Feb 13, 2024
Feb 13, 2024
Jan 23, 2024
Jan 23, 2024
Jan 23, 2024
Jan 23, 2024
Jan 23, 2024
Jan 23, 2024
Jan 23, 2024
Nov 27, 2023
Nov 27, 2023
Nov 27, 2023
Nov 27, 2023
Nov 27, 2023
Nov 27, 2023
Feb 1, 2023
Feb 1, 2023
Jan 26, 2023
Jan 26, 2023
Dec 20, 2022
Dec 20, 2022
Dec 20, 2022
Dec 20, 2022
Dec 20, 2022
Aug 29, 2022
Aug 29, 2022
Aug 24, 2022
Jul 4, 2022
Jul 4, 2022
Jan 21, 2022
Oct 7, 2021
Oct 7, 2021
Oct 7, 2021
Oct 7, 2021
Oct 7, 2021
May 11, 2021
Apr 8, 2021
May 12, 2020
May 12, 2020
May 12, 2020
May 12, 2020
Apr 28, 2020
Feb 19, 2020
Feb 14, 2020
Feb 14, 2020
Feb 14, 2020
Feb 12, 2020
Feb 6, 2020
Jan 10, 2020
Oct 29, 2019
Oct 29, 2019
Oct 29, 2019
Oct 29, 2019
Oct 29, 2019
Oct 29, 2019
Oct 29, 2019
Oct 29, 2019
Oct 29, 2019
Oct 29, 2019
Oct 29, 2019