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The patent EP2491726 was granted to Blueprint Acoustics on Dec 6, 2017. The application was filed on Oct 22, 2010 under application number EP10824317A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| LIEDTKE | Sep 6, 2018 | LIEDTKE & PARTNER PATENTANWALTE | ADMISSIBLE |
| HARMAN INDUSTRIES | Aug 28, 2018 | WESTPHAL | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | EP0904985 |
| EXAMINATION | EP2077680 |
| EXAMINATION | JPH05199595 |
| EXAMINATION | US6128394 |
| INTERNATIONAL-SEARCH-REPORT | US2005094829 |
| INTERNATIONAL-SEARCH-REPORT | US2006050915 |
| INTERNATIONAL-SEARCH-REPORT | US2006219474 |
| INTERNATIONAL-SEARCH-REPORT | US7103193 |
| OPPOSITION | EP0904985 |
| OPPOSITION | EP2077680 |
| OPPOSITION | US2001024508 |
| OPPOSITION | US4875546 |
| OPPOSITION | US5010977 |
| OPPOSITION | US5218175 |
| OPPOSITION | US5394478 |
| OPPOSITION | US6128394 |
| OPPOSITION | US6658110 |
| OPPOSITION | US7103193 |
| OPPOSITION | US7551749 |
| OPPOSITION | WO2009072033 |
| OTHER | EP0904985 |
| OTHER | EP2077680 |
| OTHER | US6128394 |
| SEARCH | EP0125625 |
| SEARCH | JPH05232974 |
| SEARCH | US5147986 |
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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Aug 7, 2024
Refund of fees
Appeal
Aug 6, 2024
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Aug 1, 2024
(Electronic) Receipt
Appeal
Aug 1, 2024
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Withdrawal of an appeal
Appeal
Jul 15, 2024
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Advice of delivery
Appeal
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Appeal
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Appeal
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Reply to appeal
Appeal
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Appeal
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Reply to appeal
Appeal
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Appeal
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Appeal
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Notice of appeal
Appeal
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Decision to grant a European patent
Search/Exam
Sep 29, 2017
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Sep 29, 2017
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Search/Exam
Sep 29, 2017
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Sep 29, 2017
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May 30, 2017
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Intention to grant (signatures)
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May 30, 2017
Text intended for grant (clean copy)
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May 30, 2017
Feb 15, 2017
Amended claims with annotations
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Feb 15, 2017
Claims
Search/Exam
Feb 15, 2017
Oct 24, 2016
Annex to the communication
Search/Exam
Oct 24, 2016
Communication from the Examining Division
Search/Exam
Jul 15, 2016
(Electronic) Receipt
Search/Exam
Jul 15, 2016
Letter accompanying subsequently filed items
Search/Exam
May 6, 2016
Submission concerning representation
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Apr 28, 2016
Submission concerning representation
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Mar 18, 2016
Amended claims with annotations
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Mar 18, 2016
Claims
Search/Exam
Mar 18, 2016
Mar 18, 2016
Submission concerning representation
Search/Exam
Dec 11, 2015
Dec 1, 2015
Nov 19, 2015
Annex to the communication
Search/Exam
Nov 19, 2015
Communication from the Examining Division
Search/Exam
Nov 10, 2015
Examination started
Search/Exam
Nov 4, 2015
Oct 30, 2015
Oct 26, 2015
(Electronic) Receipt
Search/Exam
Oct 26, 2015
Non-patent literature filed by a third party
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Oct 26, 2015
Non-patent literature filed by a third party
Search/Exam
Oct 26, 2015
Non-patent literature filed by a third party
Search/Exam
Oct 26, 2015
Observations by third parties
Search/Exam
Oct 26, 2015
Patent document filed by a Third party
Search/Exam
Oct 26, 2015
Patent document filed by a Third party
Search/Exam
Mar 23, 2015
(Electronic) Receipt
Search/Exam
Mar 23, 2015
Observations by third parties
Search/Exam
Dec 2, 2014
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Amended claims with annotations
Search/Exam
Dec 2, 2014
Amendments received before examination
Search/Exam
Aug 26, 2014
Aug 7, 2014
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European search opinion
Search/Exam
Aug 7, 2014
Supplementary European search report
Search/Exam
Jul 24, 2014
Search started
Search/Exam
Nov 15, 2013
Oct 25, 2013
(Electronic) Receipt
Search/Exam
Oct 25, 2013
Letter accompanying subsequently filed items
Search/Exam
Oct 25, 2013
Non-patent literature filed by a third party
Search/Exam
Oct 25, 2013
Non-patent literature filed by a third party
Search/Exam
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Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Oct 25, 2013
Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Oct 25, 2013
Non-patent literature filed by a third party
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Oct 25, 2013
Non-patent literature filed by a third party
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Oct 25, 2013
Non-patent literature filed by a third party
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Oct 25, 2013
Non-patent literature filed by a third party
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Oct 25, 2013
Non-patent literature filed by a third party
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Oct 25, 2013
Non-patent literature filed by a third party
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Oct 25, 2013
Non-patent literature filed by a third party
Search/Exam
Oct 25, 2013
Observations by third parties
Search/Exam
Aug 19, 2013
Aug 6, 2013
Aug 1, 2012
May 31, 2012
May 29, 2012
Communication to designated inventor
Search/Exam
May 8, 2012
Apr 27, 2012
(Electronic) Receipt
Search/Exam
Apr 27, 2012
Apr 27, 2012
Request for entry into the European phase
Search/Exam
Mar 5, 2012
Information on entry into European phase
Search/Exam
Jun 30, 2011
Notification of the recording of a change
Search/Exam
May 20, 2011
Apr 28, 2011
Copy of the international search report
Search/Exam
Apr 28, 2011
Published international application - A1
Search/Exam