Patent No. EP1656722 (titled "Methods, Systems And Apparatus For Regulating Frequency Of Generated Power Using Flywheel Energy Storage Systems With Varying Load And/Or Power Generation") was filed by Beacon Power on Aug 16, 2004. The application was issued on Aug 14, 2019.

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 |
|---|---|---|
| PATENTSHIP PATENTANWALTSGESELLSCHAFT | Nov 14, 2016 | PATENTSHIP PATENTANWALTSGESELLSCHAFT |
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
Jul 18, 2019
Jul 18, 2019
Jul 15, 2019
Jul 2, 2019
Jul 2, 2019
Jul 2, 2019
Jul 2, 2019
Jul 2, 2019
Apr 2, 2019
Apr 2, 2019
Mar 21, 2019
Dec 5, 2018
Dec 5, 2018
Dec 4, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 30, 2018
Nov 20, 2018
Nov 14, 2018
Nov 14, 2018
Jun 15, 2018
Apr 18, 2018
Apr 12, 2018
Apr 12, 2018
Apr 12, 2018
Apr 12, 2018
Apr 12, 2018
Apr 12, 2018
Apr 12, 2018
Apr 12, 2018
Apr 12, 2018
Apr 12, 2018
Apr 12, 2018
Mar 28, 2018
Mar 28, 2018
Mar 23, 2018
Mar 22, 2018
Mar 22, 2018
Mar 22, 2018
Mar 22, 2018
Mar 22, 2018
Mar 22, 2018
Dec 13, 2017
Dec 8, 2017
Dec 8, 2017
Dec 7, 2017
Dec 5, 2017
Dec 5, 2017
Dec 5, 2017
Dec 5, 2017
Dec 5, 2017
Dec 5, 2017
Dec 5, 2017
Dec 5, 2017
May 30, 2017
May 30, 2017
May 30, 2017
May 24, 2017
May 18, 2017
May 18, 2017
May 18, 2017
May 18, 2017
May 18, 2017
May 18, 2017
May 18, 2017
Jan 18, 2017
Jan 18, 2017
Dec 22, 2016
Nov 24, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Nov 14, 2016
Feb 17, 2016
Jan 21, 2016
Jan 20, 2016
Jan 20, 2016
Jan 13, 2016
Jan 13, 2016
Jan 13, 2016
Dec 15, 2015
Dec 4, 2015
Dec 4, 2015
Dec 4, 2015
Dec 4, 2015
Aug 25, 2015
Aug 25, 2015
Aug 24, 2015
Aug 19, 2015
Aug 19, 2015
Aug 19, 2015
Aug 19, 2015
Aug 19, 2015
Aug 19, 2015
Aug 19, 2015
Aug 14, 2015
Aug 12, 2015
Aug 12, 2015
Aug 12, 2015
Aug 12, 2015
Jul 16, 2015
Jul 16, 2015
Jul 16, 2015
Jul 16, 2015
Mar 16, 2015
Mar 16, 2015
Jan 28, 2015
Jan 23, 2015
Jan 19, 2015
Dec 24, 2014
Dec 23, 2014
Dec 23, 2014
Nov 27, 2014
Nov 26, 2014
Nov 13, 2014
Nov 13, 2014
Nov 13, 2014
Nov 13, 2014
Sep 19, 2014
Sep 12, 2014
Jul 28, 2014
Jul 25, 2014
May 27, 2014
May 21, 2014
May 21, 2014
May 21, 2014
May 21, 2014
May 21, 2014
May 21, 2014
May 13, 2014
May 13, 2014
May 5, 2014
Apr 30, 2014
Apr 30, 2014
Apr 25, 2014
Apr 25, 2014
Apr 25, 2014
Apr 25, 2014
Apr 25, 2014
Mar 3, 2014
Mar 3, 2014
Mar 3, 2014
Mar 3, 2014
Feb 17, 2014
Feb 14, 2014
Feb 10, 2014
Feb 10, 2014
Feb 10, 2014
Feb 10, 2014
Feb 10, 2014
Feb 10, 2014
Feb 10, 2014
Feb 10, 2014
Feb 10, 2014
Nov 4, 2013
Nov 4, 2013
Nov 4, 2013
Nov 4, 2013
Jun 27, 2013
Jun 27, 2013
Jun 27, 2013
Feb 27, 2013
Feb 27, 2013
Dec 13, 2012
Dec 13, 2012
Dec 13, 2012
Nov 8, 2012
Oct 26, 2012
Jul 20, 2012
Jul 16, 2012
Jun 27, 2012
Jun 27, 2012
May 11, 2012
Mar 12, 2012
Feb 22, 2012
Feb 22, 2012
Nov 8, 2011
Feb 3, 2011
Sep 24, 2008
Jun 21, 2006
Jun 19, 2006
Jun 19, 2006
May 18, 2006
May 18, 2006
May 10, 2006
Apr 25, 2006
Apr 18, 2006
Apr 5, 2006
Apr 3, 2006
Mar 21, 2006
Feb 8, 2006
Feb 8, 2006
Feb 3, 2006
May 6, 2005
Apr 20, 2005
Mar 31, 2005
Mar 31, 2005
Mar 31, 2005