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The patent EP2543875 was granted to Gamesa Innovation & Technology on Sep 15, 2021. The application was filed on Jul 4, 2012 under application number EP12004949A. 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 |
|---|---|---|---|
| VESTAS WIND SYSTEMS | Jun 13, 2022 | KENT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2009169390 |
| DESCRIPTION | WO2005100781 |
| DESCRIPTION | WO2006103307 |
| DESCRIPTION | WO2007051879 |
| OPPOSITION | DE19833869 |
| OPPOSITION | EP12004949 |
| OPPOSITION | EP2316629 |
| OPPOSITION | US2009169390 |
| SEARCH | DE102008055580 |
| SEARCH | DE19833869 |
| SEARCH | EP0029912 |
| SEARCH | ES2333499 |
| SEARCH | US4597715 |
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
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Dec 23, 2025
Dec 11, 2025
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(Electronic) Receipt
Appeal
Nov 4, 2025
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Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Nov 22, 2024
(Electronic) Receipt
Appeal
Nov 22, 2024
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Reply to appeal
Appeal
Nov 22, 2024
Reply to appeal
Appeal
Jul 23, 2024
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Jul 15, 2024
(Electronic) Receipt
Appeal
Jul 15, 2024
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Claims
Appeal
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Appeal
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Appeal
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Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Notice of appeal
Appeal
May 15, 2024
Notice of appeal
Appeal
May 8, 2024
(Electronic) Receipt
Appeal
May 8, 2024
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Notice of appeal
Appeal
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OPPO
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Sep 28, 2021
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Decision to grant a European patent
Search/Exam
Aug 3, 2021
(Electronic) Receipt
Search/Exam
Aug 3, 2021
French translation of claims
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Aug 3, 2021
German translation of the claims
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Aug 3, 2021
Letter accompanying subsequently filed items
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May 25, 2021
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Intention to grant (signatures)
Search/Exam
May 25, 2021
Text intended for grant (clean copy)
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May 25, 2021
Apr 28, 2021
Jan 11, 2021
(Electronic) Receipt
Search/Exam
Jan 11, 2021
Amended claims with annotations
Search/Exam
Jan 11, 2021
Claims
Search/Exam
Jan 11, 2021
Letter accompanying subsequently filed items
Search/Exam
Jan 11, 2021
Oct 30, 2020
Oct 27, 2020
(Electronic) Receipt
Search/Exam
Oct 27, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 27, 2020
Jun 18, 2020
Annex to the communication
Search/Exam
Jun 18, 2020
Communication from the Examining Division
Search/Exam
Mar 13, 2019
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Annexes in respect of a client data request
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Jan 15, 2019
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Amended claims with annotations
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Dec 21, 2017
Claims
Search/Exam
Dec 21, 2017
Aug 29, 2017
Annex to the communication
Search/Exam
Aug 29, 2017
Communication from the Examining Division
Search/Exam
Jul 12, 2017
Amended claims with annotations
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Jul 12, 2017
Claims
Search/Exam
Jul 12, 2017
Mar 13, 2017
Annex to the communication
Search/Exam
Mar 13, 2017
Communication from the Examining Division
Search/Exam
Mar 7, 2017
Examination started
Search/Exam
Nov 28, 2016
Jun 4, 2014
Jul 29, 2013
Priority search results
Search/Exam
Jul 29, 2013
Priority search results
Search/Exam
Jul 29, 2013
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Jul 23, 2013
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Letter accompanying subsequently filed items
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Jul 5, 2013
Letter concerning fees and payments
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Jul 5, 2013
Letter concerning fees and payments
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Jul 5, 2013
Payment of fees and costs
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Jun 19, 2013
Abstract
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Jun 19, 2013
Abstract
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Jun 19, 2013
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Amended claims with annotations
Search/Exam
Jun 19, 2013
Jun 19, 2013
Amended description with annotations
Search/Exam
Jun 19, 2013
Amendments received before examination
Search/Exam
Jan 14, 2013
Dec 12, 2012
Notification of forthcoming publication
Search/Exam
Oct 25, 2012
Oct 25, 2012
European search opinion
Search/Exam
Oct 25, 2012
European search report
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Oct 18, 2012
Modified abstract
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Aug 22, 2012
Communication to designated inventor
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Aug 22, 2012
Communication to designated inventor
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Aug 22, 2012
Communication to designated inventor
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Aug 22, 2012
Communication to designated inventor
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Jul 19, 2012
Letter concerning the priority
Search/Exam
Jul 19, 2012
Priority document
Search/Exam
Jul 4, 2012
Abstract
Search/Exam
Jul 4, 2012
Annex
Search/Exam
Jul 4, 2012
Claims
Search/Exam
Jul 4, 2012
Description
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Jul 4, 2012
Designation of inventor
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Jul 4, 2012
Designation of inventor
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Jul 4, 2012
Designation of inventor
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Jul 4, 2012
Designation of inventor
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Jul 4, 2012
Drawings
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Jul 4, 2012
Matter concerning the application
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Jul 4, 2012
Request for grant of a European patent
Search/Exam
Jul 4, 2012