The weekly litigation news digest is live. Subscribe now
The patent EP3751772 was granted to China Academy OF Telecommunications Technology on May 11, 2022. The application was filed on Dec 29, 2018 under application number EP18904723A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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 | Opposition Status |
|---|---|---|---|
| WISDOM FULCRUM BEIJING TECHNOLOGY | Feb 9, 2023 | NEDERLANDSCH OCTROOIBUREAU | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | EP3698500 |
| OPPOSITION | WO2013138021 |
| OPPOSITION | WO2013138047 |
| SEARCH | US2017134140 |
| SEARCH | WO2017161541 |
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
Oct 2, 2025
Sep 30, 2025
Sep 30, 2025
Sep 30, 2025
Sep 26, 2025
(Electronic) Receipt
Appeal
Sep 26, 2025
Sep 26, 2025
Sep 25, 2025
Aug 29, 2025
Aug 25, 2025
(Electronic) Receipt
Appeal
Aug 25, 2025
Aug 25, 2025
Aug 25, 2025
Reply to appeal
Appeal
Apr 25, 2025
Apr 17, 2025
(Electronic) Receipt
Appeal
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Feb 20, 2025
Feb 20, 2025
Feb 14, 2025
(Electronic) Receipt
Appeal
Feb 14, 2025
Notice of appeal
Appeal
Feb 14, 2025
Notice of appeal
Appeal
Dec 20, 2024
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Means of redress
OPPO
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Nov 21, 2024
Oct 21, 2024
Oct 18, 2024
Oct 18, 2024
Oct 18, 2024
Sep 24, 2024
Sep 24, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Mar 25, 2024
Mar 25, 2024
Mar 25, 2024
Mar 25, 2024
Mar 25, 2024
Mar 25, 2024
Jul 11, 2023
Jul 7, 2023
Jul 7, 2023
Jul 7, 2023
Jul 7, 2023
Jul 7, 2023
Jul 7, 2023
Jul 7, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 16, 2023
May 12, 2023
May 11, 2023
May 11, 2023
May 11, 2023
May 10, 2023
May 4, 2023
May 4, 2023
May 4, 2023
Feb 28, 2023
Feb 28, 2023
Feb 15, 2023
Feb 9, 2023
Feb 9, 2023
Feb 9, 2023
Feb 9, 2023
Feb 9, 2023
Feb 9, 2023
Feb 9, 2023
Feb 9, 2023
Feb 9, 2023
Feb 9, 2023
May 24, 2022
Apr 14, 2022
Decision to grant a European patent
Search/Exam
Mar 31, 2022
(Electronic) Receipt
Search/Exam
Mar 31, 2022
Filing of the translations of the claims
Search/Exam
Mar 31, 2022
French translation of claims
Search/Exam
Mar 31, 2022
German translation of the claims
Search/Exam
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Intention to grant (signatures)
Search/Exam
Dec 2, 2021
Text intended for grant (clean copy)
Search/Exam
Dec 2, 2021
Nov 17, 2021
Examination started
Search/Exam
Oct 5, 2021
Sep 27, 2021
(Electronic) Receipt
Search/Exam
Sep 27, 2021
Sep 27, 2021
Amended claims with annotations
Search/Exam
Sep 27, 2021
Sep 27, 2021
Amended description with annotations
Search/Exam
Sep 27, 2021
Amendments received before examination
Search/Exam
Sep 27, 2021
Letter accompanying subsequently filed items
Search/Exam
Sep 23, 2021
Annexes in respect of a client data request
Search/Exam
Sep 23, 2021
Annexes in respect of a client data request
Search/Exam
Sep 23, 2021
Letter accompanying subsequently filed items
Search/Exam
Sep 23, 2021
Mar 16, 2021
Feb 25, 2021
Feb 25, 2021
European search opinion
Search/Exam
Feb 25, 2021
Information on Search Strategy
Search/Exam
Feb 16, 2021
Search started
Search/Exam
Nov 18, 2020
Notification of forthcoming publication
Search/Exam
Sep 11, 2020
Communication to designated inventor
Search/Exam
Sep 11, 2020
Communication to designated inventor
Search/Exam
Sep 11, 2020
Communication to designated inventor
Search/Exam
Aug 26, 2020
(Electronic) Receipt
Search/Exam
Aug 26, 2020
Abstract
Search/Exam
Aug 26, 2020
Aug 26, 2020
Amended claims with annotations
Search/Exam
Aug 26, 2020
Aug 26, 2020
Amended description with annotations
Search/Exam
Aug 26, 2020
Aug 26, 2020
Amended drawings with annotations
Search/Exam
Aug 26, 2020
Claims
Search/Exam
Aug 26, 2020
Description
Search/Exam
Aug 26, 2020
Drawings
Search/Exam
Aug 26, 2020
Priority search results
Search/Exam
Aug 26, 2020
Request for entry into the European phase
Search/Exam
Aug 24, 2020
Aug 24, 2020
Jun 19, 2020
Information on entry into European phase
Search/Exam
Sep 2, 2019
Aug 15, 2019
Copy of the international search report
Search/Exam
Aug 15, 2019
Aug 15, 2019
International publication pamphlet
Search/Exam